Rikka Takanashi - Yenra Picture Wiki
Rikka Takanashi (小鳥遊 六花 Takanashi Rikka) is the female protagonist of Chuunibyo.
She is an intensely delusional girl who believes herself to possess a "Wicked Eye" (邪王真眼 Jaō Shingan, lit. True Eye of the Evil King) and as such always wears a medical eye patch and bandages around her left arm, though she has no injuries.
Despite being quite attached to Yūta, she is cautious of strangers and adopts a battle pose whenever she meets someone for the first time. Her fantasy weapon of choice is a frilly parasol which she wields as a sword. For her delusional operations, she often dresses in a mostly-black gothic dress and hose. She is also rather clumsy, often tripping over and forgetting things.