Charlie and Lola

The series' first book is I Will Not Ever Never Eat a Tomato, published by Orchard Books in 2000.

At first, Charlie and Lola believe that Bert is a boy, until she gives birth to a litter of baby guinea pigs. ; Tickles : Charlie and Lola's second mouse.

He can easily tickle anyone, hence the name. ; Casper : Charlie & Lola's grandparents' cat who comes to stay with Charlie and Lola sometimes. ; Bat Cat : A character from one of Charlie and Lola's favourite comics.

Squidbones first appeared in "How Many More Minutes?".

In the episode, Squidbones and his crew kidnap the Smiley Children and threaten to harm them if Charlie and Lola do not hand over their teeth.

In the episode "How Many More Minutes?", she teams up with Charlie and Lola to defeat Pirate Squidbones and rescue the Smiley Children. ; Smiley Children : A girl and a boy who have shiny clean teeth and always smile.