Ottoline Otter – Rupert's friend who is a female otter of a Scottish descent who loves Shakespeare and lives in an old castle that belonged to her ancestors.
The castle has many secret entrances hidden all over. Ottoline has vast knowledge of each entrances location and will prefer to use them instead of the stairs.
A female otter wears a green shirt, pink skirt white socks, & brown girl's shoes.
- Rupert Bear - Friend/Classmate
- Podgy Pig -Friend/Classmate
- Algy Pug - Friend/Classmate
- Bill Badger - friend/Classmate
- Fox twins (Freddy, and Ferdy) - Bullies/classmates/Rival friends
- Tiger Lily - Classmate
- Mrs. Otter - Mother