Neito Monoma, also known as Phantom Thief, is in Class 1-B at U.A. He generally exudes an air of arrogance, often mocking and loud, cunning especially when it comes to his rivalry with Class 1-A, fueled by his envy. However, towards those outside of 1-A, such as classmates and friends, he shows a different side—calm, kind, and intelligent. Monoma's behavior stems from a deep-seated inferiority complex, rooted in personal beliefs about the limitations of his quirk, coming as competitive.