Mikan Tsumiki is the Ultimate Nurse. She is an extremely meek, paranoid, and fragile individual with hazardously low self-esteem due to a history of severe abuse and bullying. She is easily intimidated and prone to breaking down and crying with little provocation. Mikan stutters nervously while speaking, profusely apologizes, and constantly worries about annoying or offending others. However, she becomes more confident when performing her nursing duties.