The Caterpillar (referred to by Orange and Pear as the Pistachio-Eating Caterpillar) is a very minor character who only appeared at the end of Mystery of the Mustachios. A pistachio-eating caterpillar was mentioned several times by Orange in the episode. After almost all of the Mustachios were killed, only one remained: Richard, the apparent leader of the Mustachios. By the warnings of Orange and Pear, the real pistachio-eating catepillar arrived and ate Richard. He then coughed up Richard's fake mustache, stating that he hated it when the Mustachios didn't shave.
| Main Characters | Recurring Characters | TV Exclusive Characters |
|---|---|---|
| Orange | Apple | Nerville |
| Pear | Squash | Apple |
| Midget Apple | Knife | Coconut |
| Marshmallow | Liam the Leprechaun | Peach |
| Passion Fruit | Captain Obvious | Tomato |
| Grapefruit | Nude Dude | Banana |
| Grandpa Lemon | Dr. Bananas | Pineapple |
| Orange's Sister | Zoom | Ginger |
| Corey | Gaming Grape | Broccoli Overlord |