Asako Onuki

Asako Oonukiis a resident of the boarding house shared with Sonoda Miko, Matsunaga Jun, Akane Hattori, kentaro Suzuki and Ryou Houjou, which the house is owned by Sonoda Miko's uncle. She loves Hawaii and is bad at cooking. She is a combination of idea big sister traits.

Trivia
According to the end of Vol. 3, the author describes her as "Beautiful, stylish, kind ... drawing her is always a pleasure. looks like the perfect woman, but really holds a terrible secret. Will we ever find out what that is?!?!"