Mikan Tsumiki is the Ultimate Nurse. She is an emotionally fragile and meek girl with extremely low self-esteem, a result of enduring years of severe bullying and abuse. Her personality is defined by her timid, stuttering nature and a constant need to apologize. She is clumsy, paranoid, and easily intimidated, often breaking down into tears. However, beneath this fragile exterior lies a darker, more unstable side. When pushed, Mikan can have aggressive outbursts, revealing sadistic obsessions, deep-seated resentment for her abusers, and other strange, unsettling urges.