Happy Tree Human??? is a spinoff. It's about some fanon and canon characters in a strange town, but is still in the Happy Tree Friends universe.
- Jack is the main character. He is 15 years old and has a girlfriend named Ally. He's based on Cuddles.
- Ally is 16 years and loves Jack. She's based on Giggles.
- Dr. Blood Thirsty is the villain. He wants to destroy the tree friends. He's based on Devious.
- Homer is a sailor who is based on Russell.
- Mr. Jerry and Xing are a father and baby duo based on Pop and Cub.
- 44 is a robot made by Dr. Blood Thirsty based on 001.
- Old Robert is a hobo based on Tromp.
- Fredwhy is a blind guy based on The Mole.