Tuffy Mouse is a small, young mouse character from the Tom and Jerry series. He is often portrayed as Jerry’s nephew or a younger companion, depending on the episode or adaptation. Tuffy is cute, timid, and playful, usually appearing in stories where Jerry looks after him or helps him out. His role is to add innocence and charm to the classic cat-and-mouse antics, often becoming involved in the conflict with Tom through his curiosity or need for protection.