Elden Ring - Shadow of the Erdtree DLC | Rellana, Twin Moon Knight Boss Fight

Gameplay of me fighting Rellana, Twin Moon Knight in the Shadow of the Erdtree DLC of Elden Ring.
Once born a Carian Princess, Rellana is the younger sister of Queen Rennala of the Full Moon, the head of the royal family of Caria, who is said to have given her a gift of lustrous black hair at birth. In her childhood, Rellana and her elder sister Rennala both met twins mysterious Moons, overlapping, as though nestled against one another.
Before long, the Carian Princess would become a true master of the blades, first wielding a Carian Thrusting Shield during her sole entry into ritual combat, a demonstration of fidelity to the Erdtree, then later opting for a light greatsword embedded with blue glintstone. Her armor was also fashioned with silver steel, and adorned with the lapis-lazuli blue that is symbolic of Caria, whose radiance is yet to fully fade.
One day however, Rellana disavowed her birthright and renounced her lineage to chase after Messmer, and chose to stand at his side instead, knowing full well that not even the brilliance of the Moon could grant him succor. As a reward, the Impaler gifted her a straight sword engraved with golden flame, to pair with her carian greatsword. Here, and here alone, were Moon and Fire ever together, and before long, Rellana became known as the Sword of Messmer.
But now, the Tarnsihed Warrior finally arrived at Castle Ensis, where many warriors who left their homelands to serve Rellana have taken up residence along with their leader, the Twin Moon Knight herself. Will he be able to face and defeat the Sword of Messmer, and reveal the path she is guarding?
Played on PC.