Kuku

Kuku is a student enrolled at Kōgen Gakuen, possessing a unique physical ability that allows her limbs to cling to and traverse walls much like a frog. Naturally curious and keenly perceptive, she once guided Tokio through ventilation shafts to secretly observe a hidden infant-related facility concealed within the school. After the academy's collapse left the world in ruin, she succumbed to illness and, in accordance with her dying wish, was committed to the sea—ultimately transforming into a man-eating creature known as the "Many-Handed Fish Monster."