Walden is a good friend, but sometimes his secret fears make him want to drop out of adventures. Walden is a science type and is mostly willing to help out. He is more careful than others, but is overall a nice and noble bear. According to the title song, he knows about science and books and art. However, most episodes show him helping by reading his books and using science; his art skills are not shown much.
Part of his extensive knowledge includes the ability to communicate with various animals. For example, in O' Figgity Fig Tree, Walden talks with a glowfly to gather it's glowfly friends to act as lights on the tree.
Walden has a habit of repeating words three times. Other than occasionally using Wubbzy's "wow wow wow", he often says "yes yes yes" when affirming something, "no no no" when disagreeing or warning, and "my my my" when exclaiming amazement.
Walden is a purple bear with black eyeglasses that have blue lenses. He has a red shirt with white polka dots and a white collar, and wears a turquoise tie.
- Walden was originally based off of Ted from A Tail of Flopsy, Mopsy, and Ted. The only difference is Walden lives in an observatory while Ted lives in a Tree Stump.