Oceiros

"Ahh, you ignorant slaves. Finally taken notice, have you? Of the power of my beloved Ocelotte, child of dragons. Well, I will not give him up. For he is all that I have."

- Oceiros

Oceiros, also known as the Consumed King, is an optional boss in Dark Souls III. The former monarch of Lothric, his wish to harness his royal blood for a greater purpose turned bitter when he unintentionally unveiled the works of Seath the Scaleless, driving him to insanity.

He was voiced by William Houston.

Appearance
Oceiros takes the form of a slender dragon with white flesh and missing scales (similarly to Seath). He lacks eyes and is covered in hair-like particles, including some that dangle from under his snout. He also has two wings on his back that, while small at first, elongate as he enters his second phase.

Personality
Once a noble and talented king, Oceiros still contains part of his sanity even after morphing into a dragon-hybrid, still clinging to belief that Ocelotte is still by his side. After taking enough damage, he realizes the truth and goes on a feral rampage like the monster he has become.

Biography
Oceiros was once the king of Lothric who sought to harness his royal blood to achieve great power. His first two sons Lorian and Lothric, who were cursed to become Lords of Cinder, along with Lorian's blood lust and Lothric's weakness, were deemed not worthy by their father in terms for his third child Ocelotte, who is merely an infant. His quest for power led him to the Grand Archive, where he discovered the notes of Big Hat Logan left by the Crystal Sages about Seath the Paledrake and his immortality. Not only was Oceiros consumed into madness like Logan over Seath's magic, but he also morphed into an abomination.

Despite his transformation, Oceiros continued to protect Ocelotte, claiming him to be a child of dragons and still harnessing his power. Somehow, Ocelotte vanished from his father's grasp for reasons unknown. Regardless, Oceiros still "protected" Ocelotte under his belief that his son is still in his hands.

The Ashen One encounters Oceiros within the Consumed King's Garden, still guarding over "Ocelotte" under his care, willing to defend his son with his own life. First using a staff to battle the player, after a third of his health is depleted, he smashes his hands on the ground before attacking like a frenzied animal. Continue attacking and Oceiros should go down.

Trivia

 * Ocelotte's crying can be heard during Oceiros' battle, even during the second phase after Oceiros goes mad.
 * Originally, Oceiros was to handle a baby during the fight, presumably Ocelotte himself. During the transition to the second phase, Oceiros would crush the baby under his claws, as shown by an early model of both a regular and a darkened, malformed infant. Sound effects were supposed to be in play as Oceiros crushes his son, but was removed likely for being too disturbing.
 * Ocelotte may indeed still be in Oceiros' grasp when he smashes his claws, as Crossbreed Priscilla, another child of dragons, can turn invisible.