Koto Yase is a central character in the anime series 'Kyousougiga.' She is a feisty and energetic girl, known for her distinctive red hood and her ability to wield a giant hammer. Koto is on a quest to find her missing mother, which leads her to the whimsical and chaotic world of Mirror Kyoto. Throughout the series, she discovers her connection to the city's mystical elements and its inhabitants. Her journey is one of self-discovery and understanding her place within the complex family dynamics of the show's universe.