Sunako always had an obsession with darkness and a morbid fascination with blood, horror movies, and similarly dark things but it wasn't until she was rejected by her first love that she openly expressed it and became even more isolated from the rest of the world. She hates excessive light exposure and also does poorly in hot weather, though the latter is because she grew up in northern Japan.
She has three "friends"; a skeleton called Josephine (with husband, sergeant George) and two anatomical figures named Hiroshi-kun and Akira-kun. While she suffers from severely low self-esteem, she is actually quite beautiful (most of her physical imperfections are a result of her self-imposed isolation from the world) and a frighteningly tough fighter, being able to lift someone twice her size with one hand. She is portrayed (mostly) throughout the manga in Super deformed form or chibi as a sort of visual metaphor for how she and others see herself; becoming beautiful when her mood becomes bold or confident.
Somewhat surprisingly, she is a very good cook, very athletic, intelligent, and a good pianist. She refers to beautiful people as "creatures of light" and "ugly" people, such as herself, as "creatures of darkness", in the translation in America. Whenever she sees a "creature of light", she gets nosebleeds, and they're usually severe when she sees Kyohei. Despite her negative attitude, once she is driven to do something, Sunako is quite capable of doing things that no one expects her to complete. There is also a possibility that she may have supernatural abilities i.e. plants wilting near her and windows shattering by an unseen force. She's also been possessed many times.
Her relationship with Kyohei is somewhat unclear, saying that she always wants to kill him, and even going to the extent of turning into a lady temporarily to get him back. Her reason is that "she's the only person who can kill him". She has not, however, thought of or mentioned killing him for many chapters, not even after he kissed her. Recent chapters have seen her forget her first crush, and she is now more open to other people, including her peers and teachers at school. She's also having less and less nosebleeds and though protests at first, doesn't greatly mind spending time with Kyohei.
List of The Wallflower Characters
Salam hangat dari neilhoja. "Sebesar keinsyafanmu, sebesar itu pula keuntunganmu."