Rikka Takanashi is Yuuta’s neighbor who recently moved in with her sister. She is intensely delusional, believing herself to possess a “Wicked Eye” hence her appearance wearing a medical eye patch. When threatened, she uses her frilly parasol as if it was a sword. She is rather clumsy, tripping mostly over nothing and is remarkably forgetful. Rikka develops feelings for Yuuta and the two are seen dating.