Himiko is voiced by Christine Marie Cabanos

Himiko has pale skin, reddish-brown eyes, and chin-length red hair. Her most notable trait is her black "witch hat", with a red strip around the middle of it, a small pin on the cloth. She also has a quite short stature and round face, giving her quite a young appearance. The right corners of her upper lips are slightly curled up, and her eyes are lazily lidded, reflecting how easily tired she gets.

Regarding her talent, Himiko considers her parlor tricks to be real magic. This is why she prefers to be called a mage instead of a magician. However, she is only seen doing rather ordinary things like hand techniques and making doves appear. She gets annoyed if people tell her magic isn't real, causing her to repeat that it is over and over again. During various situations, she tends to claim that she could use her magic to fix the problem, but she says she doesn't have enough MP. She also tends to take the credit in multiple situations, claiming it all happened thanks to her magic. Fitting her mage theme, she also uses a very notable outdated way of speaking, though this is not included in the English version. While all of this can make her appear self-centered, she has actually explained that one of the biggest reasons why she likes being a "mage" is to make her audience happy and smile, especially children.

While she has a "to the max" side as a magician, Himiko also has a very lazy side and finds putting in the maximum effort to be too much trouble. She constantly calls things tiresome and appears disinterested in things other than magic, refusing to do several things because it's "such a pain". She also struggles to communicate her feelings to others, claiming that talking wears her out and generally appears to be spaced out. While she is occasionally anxious to the point of severe trembling and stuttering, there are also moments when she just appears mildly annoyed during horrible situations and doesn't seem to fully realize what is happening. She is also notably childish, taking pride in things like brushing her teeth or going to the bathroom by herself, and constantly talks about her magic or other completely irrelevant topics during inappropriate moments. At one point, the other students agree that she would be incapable of creating a very complex plan, as Maki points out that she is "a bit slow". Because of all of this, she has difficulties connecting with others, and her overall behavior seems to suggest that she may have some form of disorder. Even though it often cannot be seen from the outside, she does feel strongly on the inside and suffers from terrible fear during the killing game.