Claire Pike is Mallory Pike's 5 year old sister. She has 4 brothers and 3 sisters.

Claire calls her mother Moozie and her father Daggles. She is going through a silly stage and sometimes runs around the house naked.

Claire and her family go on vacation to Sea City, New Jersey, and they go every year. Claire calls everyone Silly-Billy-Goo-Goo.

Claire entered in the Little Miss Stoneybrook beauty pageant in Book #15 Little Miss Stoneybrook ...and Dawn , but lost. Her talent was to sing a comedic version of the Popeye theme song, complete with dancing the hornpipe.

Claire and her sister Margo share a bedroom.

Claire was colicky when she was a baby.

Claire lives with her family in Stoneybrook, Connecticut, where she was born.

Claire's brothers are Nicky Pike, Adam Pike, Byron Pike, and Jordan Pike. Her sisters are Mallory Pike, Margo Pike, and Vanessa Pike.