Performed by: Noel MacnealThe titular Bear in the big blue house, a very warm-hearted and easygoing bear.
- Beary Friendly: One of the most triumphant examples. He's a bear and one of the most amicable characters.
- A Dog Named "Dog": A bear named Bear.
- Friend to All Children: He's very good with kids, which helps in a houseful of kids.
- Funny Animal: He walks around upright and can talk.
- Nice Guy: Eeyup. He never gets angry and is just so warm and friendly he's incapable of saying no to anybody. And yet he's not an Extreme Doormat.
- Trademark Favorite Food: He loves berries.
Performed by: Peter LinzA blue mouse who loves cheese and has a tendency to worry and fret.
- Amazing Technicolor Wildlife: A blue mouse.
- Civilised Animal: He uses the bathroom, talks, and eats from plates, yet he also lives in a mouse hole and eats cheese and bran.
- Large Ham: Despite being the smallest character on the show, he can be this. For example, there's his freak-out in the episode "Friends For Life"...
"How many times - HOW MANY TIMES do I have to say it, Treelo?! I! AM NOT! A SNOW BEAR! I! AM A MOUSE! TUTTER THE MOUSE!"
- Stock Animal Diet: Like a typical fictional mouse, he likes cheese. In fact, he's had a recurring dream about being a king and demanding more cheese.
- Trademark Favorite Food: Cheese is one of his defining favourite snacks, being a mouse and all.
- Vague Age: His age is a mystery: He has his own mouse hole, which is kind of like living alone, but then again it's connected to the rest of the house. He has his own First Day of School Episode, which logically puts him at around five or six, but maybe mice start their education as adults. And in "When You've Got to Go", he has to learn about not procrastinating with bathroom breaks, yet is able to play checkers, which is a relatively sophisticated game, competently.
Performed by: Tyler BunchAn excitable young lemur who enjoys swinging from vines.
- Amazing Technicolor Wildlife: Green with some white and blue in there. How many lemurs do you know that share his color scheme?
- Catchphrase: Oddly enough, his catchphrase is his own name.
- Genki Boy: He's very active and upbeat.
- Third-Person Person: He sometimes speaks in third person.
- The Unintelligible: While he could talk normally (though even this could be hard to understand), he sometimes descended into a rapid-fire and definitely unintelligible babble that closed-captioning sometimes transcribed as being "Treelo-ese."
- You No Take Candle: He sometimes speaks in primitive grammar.
Performed by: Vicki EibnerA bear cub with a strong imagination.
- Amazing Technicolor Wildlife: She's a red bear.
- Beary Friendly: Not as much as Bear, but still very friendly.
Pip and Pop
Performed by: Peter Linz (Pip) and Tyler Bunch (Pop)Two purple otters who love clams and swimming in the otter pond.
- Amazing Technicolor Wildlife: A pair of purple otters.
- Furry Reminder: Act a lot like humans but they like swimming like real otters.
- Trademark Favorite Food: Boy howdy do they love clams.
The moon who Bear talks to at the end of every episode.
- Catchphrase: "I would love to, Bear." and "Hello, Bear!".
- The Man in the Moon: She has a face.
- Meaningful Name: Her name, Luna, means "the moon".
- Stellar Name: see meaningful name above.
- Weird Moon: So weird that she can talk!
An anthropomorphic sun.