Sherry

Sherry is Gran's neighbour.

She is around the same age as Gran and is as jovial, goofy and energetic as Gran. However, Bertie doesn't like her very much because she expresses affection in ways he doesn't like (like hugging him, kissing him, saying he grows up fast and calling herself his auntie).

She, like Gran, is also a bit of a daredevil, not being afraid of scary rides. She is not as dirty as Dirty Bertie.

Trivia

 * Her surname is unknown,
 * Bertie calls her a "granny". This could imply she has at least one grandchild.