Howard Phillips Lovecraft

A 28-year-old (estimated) man with long hair and a gloomy face who is a member of the "Guild." Birthday: August 20 (estimated). Height: 190 cm. Weight: Varies. Blood type: Unknown. Likes offerings, sleep, chocolate, and ice cream. Dislikes fishing boats. Frequently acts in a lethargic manner. Possesses a superhuman body, unharmed by gunshots and able to easily reset a broken neck, and remained unscathed even after receiving Chūya's gravitational bullets in his "Corruption" form. His mental structure also appears inhuman, unaffected by mental-type abilities. Acted under a promise to Fitzgerald and refers to him with familiarity, though their relationship is unclear. Despite being blown to pieces from the inside by a bomb after the Double Black battle, he revived as if nothing happened after the conclusion of the Three Companies War, left a message saying "I'm going to sleep," and jumped into the sea, disappearing.

Great Old One

Transforms multiple arms into tentacles and controls them freely. While labeled as an ability, Dazai commented that "it's not an ability" due to it being unaffected by his nullifying power. During the fight with Chūya, his form completely changed into a bizarre shape. His regenerative ability is extraordinary, making him said to be invincible against external attacks. His ability name is derived from the mythos in the novels by the American writer Howard Phillips Lovecraft, known as the Cthulhu Mythos, and the ancient gods that once ruled the Earth within these works.