The Life of W.D. Gaster (Undertale/Deltarune Theory and Discussion)

This is an off the cuff theory that is 100% speculative. Something I did for fun.
Hello again people, today we are doing something a little different. In this video we are not just going to be talking about WD Gaster, we will be trying to Theorize who he is as a person. What does he want? What are his intentions and more importantly what is his motivation? When I think of WD Gaster I don't just see him as a solution to all of Deltarune's problems. No, I see a man who had fallen victim to circumstance. A man of science who wanted to further his knowledge of the known universe, who may have flown a little too close to the sun or in this case the determination extractor. Today I want to try to get to the man behind the mystery.

[@XDNighthawkXD]

Hello everyone just a quick update from me. Thank you all for 1600 subs! As you could probably imagine doing a theory every week is not very sustainable because to put it plainly, I’m running out of ideas. :p So If you have an Idea for a theory for Deltarune or another game, go ahead and leave it in a reply to this comment. I’m not completely out of ideas yet, I have maybe one more Deltarune theory idea surrounding Kris to cap off a theory about each member of the fun gang. I also have a Oneshot theory in the works. Aside from that I have two new BIG video projects in the works that are NOT theories. I know that Non theory videos get less views by comparison and that’s okay because I actually do enjoy making them. I’m going to continue to make videos that I like whether or not they get views because frankly, I didn’t start this because I wanted to get big views or become famous or whatever. Expect those in the near future. Until then thank you all so much for watching, goodbye.

[@swe3t_coffe326]

My favourite genre of theory is the "I don't believe any of this, but it'd be cool if it were true". As for this one, I like it. I don't know whether it will be true or not (given Gaster's whole 666 motif, and Chara potentially even speaking to Gaster through game files in Undertale(?)) but it's cool to think of

[@WheeloMonke69]

My man gaster forgot to pay his electricity bills

[@mask_vids9834]

And also… Chara is not automatically evil. Chara is not some force constantly trying to break out and destroy everything. They do this in the Genocide route reacting to the players actions.

[@Michal-je1hx]

Chara literally said that they understood the reason and purpose of their resurrection because of our actions and I have the impression that in the neutral and especially in the pacifist thay see no reason to intervene beyond communicating with us as a narrator

[@H.A.Sproductions]

People tend to forget that Chara is a child who we force to watch us kill almost all monsters

[@krisspychissp]

People (including myself at one point) really want to say that Chara was a good person who we manipulated in the genocide route, but, in my opinion Chara was pretty evil the entire time. Ofc the player does the genocide route not chara but from what we know Chara was never a good person. They were always creepy always loved knifes, made a plan to like… kill themselves to free monsters because of how much they hated humans, and to round it out in the genocide route we confront chara, but in no other route possibly referring to them having always been evil and the genocide route just accentuating that.

[@TheSkyGuy77]

Hmmm, never thought of Gaster potentially being human at one point-

[@GuidingLightAngel]

This is all well and good, except the entire theory falls apart during the Chara part. I can take everything you said about gaster, because it can quite literally be almost anything, but the Chara part is just... Actually just straight up wrong? Chara isn't a demon, Chara was never the one controlling Frisk to do no mercy, they were a spectator, who watched as WE do the no mercy run through Frisk, it's through the no mercy run that Chara becomes what they are at the end of no mercy, after at the very least, a century after their death and potentially the first thing they see after waking up, is someone that destroys the only home they cared about so much, that dusts those they called family. If you attempt to bring the "Chara poisoned asgore" or "Asriel said chara wasn't a good person", the pie poisoning was an accident, and just because Chara wasn't the greatest doesn't mean they were evil either, they were a kid that had a lot of baggage after surviving the fall to the underground, found a family that cared so much about them, felt guilt after accidently poisoning their adoptive father, and, as the underground's hope, tried to form a plan to both get enough souls and get revenge on the humans at the surface, went with it, but it failed, which caused them and their brother to pay the price. As messed up as the plan was, it had good intentions, and Chara ended up paying the biggest price out of everyone for it's failure. Tldr: Chara isn't an evil demon, Chara isn't someone that kills senselessly, we committed no mercy, we were the ones to never give up during it, all Chara was throughout most of it was nothing more than a bystander, which brings the consequences of OUR actions after the point of no return.

[@UnoriginalJokester]

I do agree that this video exaggerated Chara's immorality a bit, but you can't deny the fact that they did enjoy participating in the no mercy route. Or, at the VERY least, was not "nothing more than a bystander." If they were just a bystander, why would they tell you how many monsters are left? Or utter the "that comedian" line, reminding you that you need to kill Snowdrake? Or even express disappointment when the route is aborted? If Chara was truly just a bystander, or even disliked the no mercy route, you would think they wouldn't want to provide this information to you. Not to mention after completing a no mercy route in the Undertale Demo, one of the pages of the instruction manual say "That was fun. Let's finish the job." in red text, seemingly confirming that Chara did see the no mercy route as a fun experience, even as early as the Ruins. They are willingly helping you throughout this genocide. Yes, the one who led the charge in the no mercy route is the player, but Chara should also be admitted some responsibility here. We quite literally couldn't have done it without them, at least not as efficiently. One final detail: Chara literally called *themselves* a demon, similar to how Asriel calls himself a god when he has godlike powers. Referring to Chara as a demon is not exactly unwarranted.

[@GuidingLightAngel]

@@UnoriginalJokester The "Chara is helping us with no mercy" only applies when you're using NarraChara, which causes a massive dissonance when in pacifist, Chara would end up being your biggest supporter and helper, there's some big inconsistency here. But the fact is, Chara, at the very least before their death, was not a monster, and clearly even after their death, they weren't a monster by default, they only started truly helping us after we end toriel's life, which is when the counter begins to show up, and while the "Where are the knives" can certainly tell some things about Chara, if we abort no mercy at toriel, Chara returns back to their friendly self. I still Chara is mostly a spectator until the end of no mercy, and even THEN, they only even begin the no mercy dialog when WE start no mercy, Chara didn't start no mercy, and they certainly weren't the ones that specifically went after every single monster possible, most they did was count how many monsters were left, and even more is that, if you stop no mercy even after beating sans, Chara still turns back to normal if narrachara is to be believed, and Chara IS one of the few characters that remembers resets. Things only become truly unsalvageable when we, ourselves, fully go through with no mercy and actually complete the route. Also the one that says they are disappointed in you aborting no mercy is flowey, not Chara.

[@UnoriginalJokester]

@@GuidingLightAngel I literally said in my comment that I know the player is the one who led the charge in the no mercy route. Chara causing the no mercy route is not what I'm trying to say. All I'm proving is that Chara is at least a willing participant. I'd argue the examples I provided are NOT dependent on NarraChara, since the examples I provided are strictly lines in red text. Even if NarraChara itself is false, it's very likely that the red text specifically is narrated by Chara. Therefore, my previous points still stand, NarraChara or not. I do admit that the "Chara is disappointed" point is actually dependent on NarraChara, but, the "that comedian" line still appears in red text, which still makes it somewhat valid. But, sure, let's go with the assumption that NarraChara is true. If you fail to kill Snowdrake in Snowdin despite killing 16 monsters, one of the save points has them saying "The comedian got away. Failure." They seemingly express disappointment that you failed to kill Snowdrake, and thus aborted the no mercy run. Even if NarraChara isn't true, as I stated before, the red text is at least narrated by Chara. So, the "that comedian" line is still valid, as it means Chara is trying to encourage us to go back and kill Snowdrake. NarraChara or not, this point is non-negotiable. You're thinking of what Flowey says after you reset during a no mercy run. This is what I was actually referring to.

[@GuidingLightAngel]

@@UnoriginalJokester Ah I see, I thought you were referring to flowey. Also that line has some implications that I haven't actually thought about, since I don't think that happens with anything else, would imply Chara has some beef with Sans we have no idea of, since I am not sure if Chara acts that way on an aborted no mercy run towards anything else besides Sans.

[@UnoriginalJokester]

​@@GuidingLightAngel That line is in reference to Snowdrake, not Sans. "That comedian" only shows up if you missed Snowdrake earlier on. If you kill 16 monsters in Snowdin without killing Snowdrake, that's when "the comedian got away" shows up.

[@Snow-vk7th]

This makes a lot of sense, had a lot of fun in the speculation. I feel like this takes a bunch of separate theories I've heard and turns them into one. Probably my current head canon now :) It's understandable to run out of theories, Deltarune only has 2 chapters out T_T We've been without content for a while. Other games to cover... maybe omori, hollow knight, or one shot? I can't really think of any games that would have theories this intense. Excited for the video essays though!

[@lilacpenguin5329]

I want to contribute Rainworld also! It has a ton of potential for theory crafting :D

[@metal42]

I thought you were mysticslime for a sec

[@damqn4etobg]

NEW NIGHTHAWK UPLOAD LES GO

[@myri_the_weirdo]

If you speak French there's the ''gaster trilogy'' videos by the channel captainhype is maybe the best deep dive of the character (well mainly because of the date of creation of the vids and the lack of a big theory sphere in france)

[@RotcodFox]

I actually really love the ideas of how you connected Gaster and Chara to Deltarune, that's something that I could actually believe Toby would do. It makes a lot of sense when compared to some other theories about Ralsei and the roaring

[@rafsandomierz5313]

The first three were the perfect example of mandela effect in the fandom.

[@myri_the_weirdo]

I think he'd like kebabs

[@adamgarbett1955]

I wanna put something into the theory community that is interesting. Gerson from undertale talked about the deltarune symbol, and as far as I know, no one has talked about the connection to deltarune the game.

[@rafsandomierz5313]

Everybody talked about it when chapter 1 got released.

[@Star.Ast3r]

Foolishness, little birb, Foolishness! I have asked how He is many times, but I've never gotten an answer. He hates talking about it.

[@Michal-je1hx]

1) monsters can have determinaton just not as much as human "* monsters' physical forms can't handle "determination" like humans' can. * with too much determination, our bodies begin to break down." it's straight up saying *"too much"* 2) monsters in Deltarune can bleed; Susie says "* Everybody bleeds, right? Don't worry about it." 3) Sans refers to "coming back" as something separate from getting on the surface "look. i gave up trying to go back a long time ago. and getting to the surface doesn't really appeal anymore, either." 4) Gaster might as well fell into the machine in Sans' workshop "* (Blueprints.) * (You can't read the symbols they're written in...) * (... or maybe it's just the handwriting.) * (Looks like they relate to some kind of strange machine.)" and "* (There's a strange machine behind the curtain.) * (It seems to be broken.)" or any other of his creations that we don't know aboute yet 5) Deltarune (the game) is, to some extent, Gaster's creation "WELCOME. HAVE YOU BEEN LOOKING FOR ME? HOW WONDERFUL. I HAVE BEEN LOOKING FOR YOU AS WELL. I HAVE SOMETHING. SOMETHING I WANT TO SHOW YOU. SOMETHING I THINK YOU WILL FIND VERY, VERY, INTERESTING BUT IT IS NOT COMPLETE YET NO IT IS FAR FROM COMPLETE" also the entire Goner Maker sequence and the game menu (before the first chapter ends) strongly indicates that Gaster has meta control over Deltarune 6) Chara refers to "erasing the world" in the same way as Flowey/Asriel, which insinuates that they are referring to the use of the Reset ability, and what we know as the Timeline in Undertale shows much smaller changes than Undertale to Deltarune, making it not so much a Timeline from Undertale but a completely different universe with different rules (for example that monsters can bleed) 7) Chara explicitly says that their intentions are inspired by us "Thank you. Your power awakened me from death. My "human soul." My "determination." They were not mine, but YOURS. At first, I was so confused. Our plan had failed, hadn't it? Why was I brought back to life? You. With your guidance. I realized the purpose of my reincarnation. Power. Together, we eradicated the enemy and became strong." and in the neutral and especially in the pacifist thay see no reason to intervene beyond communicating with us as a narrator 8) Chara blames us for the genocide and says that they will cooperate with us in making the Genocite Route together indefinitely. The only thing Chara says they want is our soul (to become alive again). Chara never talks about their own intention to commit genocide and even encourage us to do different route "There is a reason you continue to recreate this world. There is a reason you continue to destroy it. You are wracked with a perverted sentimentality. Hmm. I cannot understand these feelings any more. Despite this. I feel obligated to suggest. Should you choose to create this world once more. Another path would be better suited."

[@devlinmcguire7543]

I have personally used to think Gaster was a human too years ago. Never decided I did, just kinda thought "I'll leave this thought on a window sill for a while.". Never actually thought that Gaster being a human was bad. It's one of my favorite theories.

[@joshb7384]

I NEED Gaster to be a good person who is corrupted and we need to save him and then he can be happy with Sans and Papyrus

[@Unsmart_pineaplle]

I feel like it wouls be better if the chara counterpart is the soul and kris is the frisk counter part but its realky fun speculating about all off this

[@damonkatumaru]

If Chara can destroy universes, can they be consider to be, in a ways, Profound Darkness? In fact, there has been refences to Undertale in Phantasy Star as Slayer's class tutor mention seeing your soul. Could Gaster met the Arks during his galactic travels? Did they exchange research which lead to the arks having technology? Could Gaster's research into Negative photons can be used to defeat the starless? Seems everything is relative.

[@willsmith5935]

this is GENUINE fan-fiction!

[@UnoriginalJokester]

I've never found any reason to believe Gaster experimented on determination at all. Is there something I'm missing? Also, as far as I'm aware, the Undertale Chara can't be in Deltarune. Toby said in a Q&A that the world of Undertale will remain untouched, that if you completed the game already, it's exactly as you left it. That's about as much of confirmation as you're gonna get when it comes the relations between the games. The Undertale Gaster is allowed to exist in Deltarune because, in Undertale, he could barely even be considered existent. He was a mere concept that was there purely to foreshadow Deltarune. Chara doesn't get that excuse.

[@Volian0]

reason why gaster might have experimented on determination: - he was a royal scientist - the king wanted to destroy the barier - destroying the barrier requires human souls - human souls have determination also, it's implied that Determination Extractor was built by him, so that's a pretty huge evidence Also, toby fox said that there will be some connections between UD and DT, so I think these universes are somehow connected but whetever we do in Deltarune will not affect the world of Undertale also, he was not a mere concept, he existed in Undertale universe as confirmed by his followers

[@UnoriginalJokester]

@@Volian0 Just to be clear- when I said Gaster was nothing more than a mere concept, I meant that narratively speaking, not that he didn't exist in-universe. He quite literally had zero real participation in Undertale's main plot. Chara, on the other hand, was incredibly important to the game's plot. That was essentially my argument. I would think the the royal scientist's goal being to destroy the barrier would prove that they are assigned to research SOUL power, which we know is separate from determination. Alphys confirms this herself in the first few entries. So while it's likely that he looked into SOUL power, that doesn't necessarily mean that he experimented on determination as well. And, while, yes, Toby did say there would be some connections between the two games, he also said not to worry about Undertale's world or characters & that it will remain untouched. Putting the Undertale Chara in Deltarune would be a complete contradiction of that. Also, where is it ever implied that Gaster created the DT extractor?

[@Volian0]

​@@UnoriginalJokester Well, I'm not saying that Chara from UT is in Deltarune, it would be kinda pointless from storytelling perspective, bcuz chara was already an "antagonist"(?) in undertale, but anyway I always thought that soul power is determination, because entries 1-4 talk about Power of the Soul and entry 5 says "I extracted IT from human souls", which implies she's talking about the same thing and then she says "Lets call this power Determination", also alphys says she used the blueprints to build DT extractor, so I think the blueprints were made by the previous royal scientist

[@UnoriginalJokester]

@@Volian0 I wouldn't say they were an antagonist, but they definitely were a key player in at least the entire genocide route. The whole point of extracting determination from the human SOULs in the first place was to try to get monster SOULs to persist after death so that she can use monster SOUL power. If determination & SOUL power were one & the same, she wouldn't need to do this. She could just work with determination alone. And, no, that's not what she said. She said she used the blueprints to extract determination from the human souls, not to build the DT extractor. It's always been my assumption that "the blueprints" IS meant to reference the DT extractor itself, and what she's really saying here is "Using the DT extractor, I've extracted it from the human SOULs."

[@ellie7252]

ah, post-mortem Nen.

[@lilacpenguin5329]

Me and my sister actually speculated some ideas on how a human might transform into a monster, including how Gaster might have been a human. We got the idea of Gaster injecting determination (or magic, i dont remember) into plants, just like how Alphys injected determination into the flowers where Asriel died. (Which accidentally turned the remains of Asriel into Flowey.) OR there were plants that were feeding off of magic and were imbued with it, that allowed humans to consume magic safely or something. Then as he ate the flowers, it made it so that his soul didn't need to be tethered to his human body to remain alive, since he had determination; this (somehow) transformed him from a human into a monster skeleton. I just forgot all the finer details and has basically 0 supporting evidence. Fanfiction nonsense of course, lol, but I just thought it was fun someone else had the same idea. The only issue me and my sister came into was that timeline-wise, I couldn't figure out how to make it work, since Papyrus doesn't seem like he's met a human before. It's implied that his screen name on the Undernet in Undertale is Coolskeleton95, which could be interpreted as 1995 or 2095 (long after Chara is speculated to have died in 2015.) If we are to believe that the game takes place in 2115, 100 years after the first human fell in 2015 (the one we name and the one everyone calls Chara,) this would make Papyrus 20 years old or so. The purple bunny shopkeeper says that Papyrus and Sans just showed up one day, and she kind of made it sound like that was recently. So either Gaster had Sans and Papyrus (with who???) waaay late in life and then just disappeared after making the core and determination extractor, or they were all a family originally and Papyrus doesn't remember being human and doesn't remember being around humans. And somehow, all of this takes place after Chara dies in 2015 and then the last other humans that fell into the underground after them, the souls of the other children that Asgore has kept. Blah blah blah, idk i wanted to share some nonsense i guess lol

[@sahilhossain8204]

Lore of The Life of W.D. Gaster (Undertale/Deltarune Theory and Discussion) momentum 100

[@CongregationGDReal]

Gaster hang in there 😔😔😔😔

[@daltonharmon1018]

About your possession theory from another video about the third movement type kris has, what if that movement is caused by the chara from the genocide route of undertale due to how she mentions about moving on to the next world at the end of that route, another timeline sounds like it could be another world. And maybe the true ending of deltarune will cause the events of undertale to happen creating something like an ouroboros of events, a self sustaining paradox, because Toby has confirmed that megalovania is in fact a deltarune song, sans is the only monster that bleeds just like how susie has a bleeding sprite that goes unused in deltarune chapter 2, the darkners if you do kill them in deltarune with a exploit turn into red dust, and we do not see what dust color sans turns into, we assume white but he dies off screen so we can't know for sure. So my own guess is that if my theory is even remotely true, sans, kris and susie will probably become friends, take a picture together, then somehow he finds himself in the undertale timeline, chara causes a genocide route again, he fails to stop them, and then deltarune happens again, meaning the only way to break out of the cycle that we currently know of would be a true pacifist route, but even then it doesn't stop due to how sans seems to know he's been outside of the underground inside of undertale.

[@JustAnAutisticAussie]

Gaster was just trying to enjoy his life as a Scientist and now he's accused of being the most evil man in the world 🤣

[@mask_vids9834]

Gaster, sans and papyrus being human doesn’t make much sense. The monsters modern way of life is a result of studying human garbage which for all we know was alphys’s doing. Gaster’s one confirmed achievement is the creation of the core and his success lead to the tragedy of his death. Finally… Chara and Gaster likely won’t be in deltarune because both of their stories and their tragic fates are exclusive to undertale and not necessary for deltarune’s story.

[@UnoriginalJokester]

Nearly every Undertale character suffered a fate that was unique to Undertale, not just Chara and Gaster. And yet, here they are in Deltarune, so why would they be exceptions? I find it highly unlikely that Gaster won't have at least some involvement in the plot. He literally said a prompt of the Delta Rune prophecy word for word on the website, after all.

[@rafsandomierz5313]

Gaster references the legend of Deltarune at the Deltarune's site in 2015. (In Windings) At the end of world's edge three heroes appeared to banish the Angel's heaven... Gaster references Darkness in his entry 17 which is theme of Deltarune. Also shadows growing is how fountain is open and is foreshadowing for the roaring explained in chapter 2. Gaster's follower (the calm girl) references Suzie on switch (her transformation into Gaster follower is only available on switch) which is Deltarune character. Deltarune is not a sequel but entierly different universe with connection to Undertale.

[@youtubeneedstochange4414]

If you think Gaster won't be showing up in Deltarune at all after the insane amount of Gaster foreshadowing that the Survey Program, Chapter One, Chapter Two, AND the Spamton Sweepstakes have been throwing in, then I don't know what to tell you haha. It is highly likely that Gaster will be playing a major role in Deltarune's story. We just aren't sure what yet.

[@flawlessgaming1871]

I legitimately believe that Gaster is chill and just has like autism or something like he cant be a bad guy hes just mysterious

[@devlinmcguire7543]

I love this theory!

[@DAVINNIA314]

Interesting Ideas!

[@zeo4481]

No one has ever proposed something as stupid as Sans and Papyrus were human before. Congratulations! You have officially beaten JaruJaru for worst UT theory

[@ralsei3157]

And your clearly unhappy in your life

[@PixelsPolygonsNPetrichor]

wow so informative

[@Narnes64]

Well this certainly was a theory…

[@3DFella]

Never cook again 💀

[@alny0]

This Theory will be so good if chapter 2 didn't release.

[@harley202]

Maybe I missed something, but what part of this video gets proven out right wrong by chapter 2? Not that I believe this theory might be true, I just don't understand why chapter 2 would cancel it out? 😅

[@alny0]

The game is not complete may be any theory Will be true even kris is dead theory

[@Nintendogs08]

Imagine if this one actually turned out to be the true story lol I actually really like this!!

[@The_Adventurer73]

I believe this!

[@Oceane1803]

I thought you'd make the remark that the red liquid coming out of Sans can't be blood or ketchup, because this is in a battle, where everything is in black and white (including blood and ketchup). The thing that comes out of Sans can be one thing only, the only thing that appears red during a battle. Determination. My theory on Sans and Papyrus is that they're the skeletons of two of the humans that fell into the Underground. The Justice human for Sans (since he's a judge) and the kidness human for Papyrus (being very kind and liking cooking like the kidness human did, as we learn in the Omega Flowey fight). We know Gaster experimented on Determination, so I think that he injected Determination in the skeletons of these two humans, like what Alphys did with Flowey, explaining their strange awareness and power. It makes sense with the Summer newsletter where Papyrus seems to vaguely recall green grass from the place they came from, which can be the surface.

[@orggannick]

Cool theory, but by that logic Asgore's trident would also be made of determination. I think the "blood" (or whatever it is) appearing red is more of a stylistic choice than intentionally trying to draw a connection between it and the SOUL.

[@Oceane1803]

@@orggannick Monsters can have Determination. Just in small amounts. If Monsters can create attacks that tie to other traits like blue attacks for patience, or orange attacks for bravery, I think it's possible that a Boss Monster, which can survive a bit longer after death, can support more Determination and create Determination weapons. And in battle, Toriel has brown eyes, or more precisely, dark red, which would hint at a very small amount of Determination.

[@corpsemachine6949]

Doesn't Papyrus only cook because of Undyne

[@UnoriginalJokester]

The reason the red liquid is red is for the sake of emphasis. It's supposed to heavily grab your attention by contrasting from the rest of the battle. Sort of like a mini twist.

[@Oceane1803]

@@corpsemachine6949 Maybe. But he still doing it.

[@AwesomeDr111]

Chara theories are really boring tbh. People who say "Le evil universe hopping demon wants to kill universes because it is le evil" always miss the point of Chara's existence in Undertale

[@flamingfire0]

hi

[@Quinhala11]

Skeleton (or ghost) monsters being dead humans is lamer than them just being monsters who happen to look like human-ish skeletons. I disagree that Sans bleeds, it's obviously ketchup, that's why the game places a huge emphasis on Sans liking ketchup. Kris is clearly Frisk. Same exact skin color, hair color, facial expression, same name without an F, both protagonists, Clam Girl saus Frisk would be besties with Suzy meanwhile Kris is besties with Susie, etc etc. Only thing Kris shares with Chara is a like for chocolate and knives, which we never learn Frisk's opinions on. While yes Chara is more of a sibling to Asriel, Frisk is more of a Dreemurr than Chara since Chara was never officially adopted. Also i disagree that Gaster is a skeleton, i say this with 0 irony: I believe Gaster is an egg monster. He's an egg because he's a literal easter egg, and he has a font name because egg shells and bones are kind of made of the same thing.

[@elcalabozodelandroide2]

Jb 042x