Toka Takanashi is a supporting character in Love, Chuunibyou, and Other Delusions!. She is the older sister of Rikka Takanashi. She lived one floor above Yuuta Togashi for quite some time. She is allergic to cats, which later forces Yuuta to keep Rikka's cat. She gets frustrated when Rikka is too obsessed with her delusions.