This is a list of characters that have been seen or have been mentioned by other characters in Harvey Beaks.
- Harvey Beaks - A playful and well behaved blue bird.
- Foo and Fee - The wildest twins in the forest and Harvey's best friends.
- Miriam Beaks - Harvey's mother.
- Irving Beaks - Harvey's father.
- Michelle Beaks - Harvey's baby sister.
- Dade - A chubby rabbit that admires Harvey but dislikes Fee and Foo.
- Claire - A shy, bespectacled fox who has a crush on Foo
- Piri Piri - A female yellow bird who is Claire's best friend and an artist. She sees good in everything, including Fee and Foo.
- Kratz - A skunk who is considered boring, unlucky, and miserable. He is usually treated like a loser and a nobody except by Harvey. He sprays noxious gas whenever he feels scared, nervous and/or in pain.
- Princess - An obnoxious, female owl that wears a pink dress and a tiara. She is bad-tempered, selfish and extremely spoiled.
- Rooter - A warthog that has a large mowhawk and speaks with an Australian accent. He is a wilderness survivalist.
- Technobear - A fat, street-smart brown bear in a reddish speedo. He is very loyal to Harvey.
- Jeremy - A big, furry mushroom with an elephant trunk-like nose, and talks with a Mickey Mouse-like voice.
- Doctor Roberts - Princess's friendly but eccentric father.
- Moff - A steampunk-admiring, lonely moth who is good friends with Irving Beaks and holds a grudge against children, especially Harvey Beaks.