A 14-year-old red oni from Onigashima who transfers to a middle school in Tokyo. She has a cheerful personality and is brimming with curiosity. She loves company and treats everyone the same. Although she is friendly with everyone, sometimes she confuses others by invading their personal space. She’s enthusiastic about improving the oni’s image and gives it her all, but she’s a little timid at first. However, she has a determined mind and once she decides to do something, she sees it through to the end. Although, sometimes that trait can lead to trouble and she finds herself veering off course into a crazy direction. She loves cities and is intensely interested in fashion and romance.

A 14-year-old yellow oni from Onigashima who transfers to a middle school in Tokyo. She’s as active as she looks, is mischievous, and likes to play pranks. She yanks Tsutsuji and Tsuyukusa into various situations and challenges. She’s generally the kind of person who doesn’t care what others think and does whatever she wants, but she also has another side that is grounded in common sense and can’t handle things going awry. For example, whenever Tsutsuji and Tsuyukusa pull away and start doing strange things or something unexpected happens, she freaks out. Out of the three of them, Himawari is the most skilled at cooking, cleaning, and doing laundry. She uses her skills to support their healthy lifestyle.

A 14-year-old blue oni from Onigashima who transfers to a middle school in Tokyo. She’s a beautiful girl who gives off the impression that she’s a loner who never gets agitated and always keeps her cool. But in reality, she’s simply a slob and a lazy downer. She’s something of a genius and can get most things done with little to no effort, but any kind of work is bothersome to her so she often passes it off to Tsutsuji and Himawari. She has the most adult mentality of the three, but when it comes to sweets, she’s like a child who will do anything to get her hands on them.