Himiko is a very cheerful girl, to the point of smiling even after having presumably killed someone, displaying sadistic tendencies. This continues even when danger is imminent, as shown when Tomura Shigaraki was about to attack her, but it tends to stop when she is bored or annoyed. Himiko is frequently seen blushing seemingly out of excitement rather than embarrassment, giving her a permanent look of what appears to be lovesickness on her face.