Yotsuya

Yotsuya is the mysterious resident of room 4 at Ikkoku-kan, with even basic details such as his age and occupation unknown to the other tenants. He delights in peeping, eavesdropping, and creating chaos, often using the large crack connecting his closet to Godai's room. His rare attempt at tutoring Yagami does little to clarify what he actually does for a living.