獪 岳
from Demon Slayer: Kimetsu no Yaiba
A young demon who attained the position of Upper Moon Six after the deaths of Daki and Gyutaro. Originally one of the orphans under Gyōmei Himejima, he was chased out by the other children for stealing temple money and encountered a demon, which he then let into the temple in exchange for having his life spared, thus leading to their deaths and Gyōmei being falsely arrested. He then becomes a member of the Demon Slayer Corps, learning the Thunder Breathing from Jigoro along with Zenitsu, before betraying the Slayer Corps and allowing himself to be transformed into a demon by Kokushibo, which leads Jigoro to commit seppuku in atonement. Unlike Zenitsu, who only mastered the first of the six techniques of the Thunder Style, Kaigaku only mastered the other five. He is killed when Zenitsu strikes him with a seventh, exclusive technique developed by him.
Demon Slayer: Kimetsu no Yaiba
Since ancient times, rumors have abounded of man-eating demons lurking in the woods. Because of this, the local townsfolk never venture outside at night. Legend has it that a demon slayer also roams the night, hunting down these bloodthirsty demons. For young Tanjirou, these rumors will soon to become his harsh reality... Ever since the death of his father, Tanjirou has taken it upon himself to support his family. Although their lives may be hardened by tragedy, they've found happiness. But that ephemeral warmth is shattered one day when Tanjirou finds his family slaughtered and the lone survivor, his sister Nezuko, turned into a demon. To his surprise, however, Nezuko still shows signs of human emotion and thought... Thus begins Tanjirou's quest to fight demons and turn his sister human again. (Source: VIZ Media)
