Yuu Usada is a minor character in the anime series One Punch Man. She is known for her role as an office worker at the Hero Association, where she manages administrative tasks and supports the heroes. Despite her limited screen time, Yuu is depicted as diligent and helpful, contributing to the smooth operation of the organization. Her character adds a slice of everyday life and realism to the otherwise fantastical world of heroes and monsters, highlighting the importance of non-combat staff in the Hero Association's success.