Kasumi Yashiro is a major character in the visual novel series Muv-Luv. She is a mysterious and enigmatic girl who plays a crucial role within the Alternative timeline. As an artificial human created through genetic engineering, she possesses immense intelligence and psychic abilities. Kasumi is often seen as an emotionless figure due to her rigid demeanor and lack of social interaction. Throughout the series, she aids the protagonist, Takeru Shirogane, and his allies by providing vital information about the extraterrestrial threat known as the BETA, while gradually developing her own sense of identity and emotional depth.