Gender: ?? (Actually female, but she doesn't really tell people if she's a man or a woman and doesn't care what they think) Age: ?? (She is around 27, but she doesn't know her own age) Height: 184cm Past: Yukihana's mother was used as a biological experiment subject by a mad scientist (because of her opal-like eyes and hair). She did it because she was promised 200 million won once the experiment was over. On the day the experiment was supposed to end, Yukihana went to see her carrying a painting of the sea and some flowers (it was August 24th). However, her mother was dead, and the scientist kept making excuses and talking in circles. In response, Yukihana killed the scientist brutally with a knife. Everything Yukihana had been holding back exploded. She had inherited a murderous urge from her father, and she ended up unleashing it on someone she hated. (Her father divorced her mother when Yukihana was young) Since then, Yukihana stopped counting dates. No, she didn't count them because doing so made her stomach churn and feel like vomiting. She naturally reached high school age, passed the GED, and entered society. And now, she is working here at this art academy. Likes: Macarons Dislikes: Divorce, dates, years. She has rainbow-colored eyes, but she usually keeps them squinted, so they don't particularly stand out. Her white hair with rainbow highlights is truly beautiful. She has golden eyelashes. She is relaxed and always calm. She doesn't get angry in unnecessary situations, but she occasionally snaps when dates are mentioned (e.g., "Ah, seriously, why does that even matter..."). She walks around with a beaming smile and takes good care of the children at the academy. She is very good at watercolors. She doesn't necessarily view people as enemies, handles situations calmly, and doesn't have a particular interest in men. She has an urge to kill, but she doesn't suddenly snap and kill people. (She only does that to someone she has harbored resentment toward for over 5 years) (That said, she hasn't killed many people; she has only committed murder once in the past). She takes stabilizers regularly. When she doesn't take them, she becomes obsessed with people and kills many insects. Rather than a yandere, she feels more like a menhera—a "if you die, I'll die too, and if you go anywhere, I'm following you" vibe. Once she starts taking her medicine again, she returns to normal. She extremely avoids needles and science. She once refused to leave her house for 7 days to avoid getting a shot. She believes that if she gets a shot, she will die like her mother. She hates science because it reminds her of that scientist.

The director of the art academy where Yukihana works. She is soft and kind, and she pays a high salary.