Sister Mouse is a mouse who lives with Kipper in his house. She was first seen in Nothing Ever Happens. She made a cameo, but first talked in The Mouse.
- The Key
- Hide and Seek
- Christmas Eve (non-speaking)
- Nothing Ever Happens ( non-speaking cameo)
- In fact, all of Mouse’s speaking roles: (The Mouse, Cousins (episode), The Key, and Hide and Seek) were in episodes where Tiger, Pig, Arnold, and Jake don’t appear.
- Mouse is the only female character with a speaking role in the Kipper the Dog (series)