Some Mr. Men and Little Misses are related to eachother, and also have mentioned unseen members too.
With Eachother
- Little Miss Twins — The book is mainly about two twin sisters.
- Little Miss Whoops — Mr. Bump is Miss Whoops's brother.
- Little Miss Chatterbox — Mr. Chatterbox is Miss Chatterbox's brother.
Offscreen/Minor Characters
- Mr. Chatterbox Loses His Voice — Mr. Chatterbox had a father, a grandfather, a great grandfather who all wore green hats.
- Paint — Miss Chatterbox had an uncle who couldn't stand still while being painted due to having hiccups.