Yoru

Yoru is a mysterious black cat monster lurking deep within the labyrinth, encountered by protagonist Oda Aki in its lower reaches. Once the fearsome ruler of the 80th floor, she earned the dreaded title 'Nightmare of Adreia' as its formidable guardian. After forging a contract with Aki, she transitioned from adversary to his bound familiar. Possessing exceptional intellect and knowledge of the world's true nature, Yoru habitually greets Aki with biting sarcasm—yet when he faces the kingdom's conspiracies and battles, she proves to be his most dependable and steadfast ally.