Hyzenthlay's anatomy is extremely similar to a squirrel's. Her fur is an unkempt reddish-brown littered with large white swirls, most notably on her shoulders, thighs, and cheeks. She has two long, pointed ears that appear to twitch often especially when she's nervous. Her mouth is tiny and her flat buck-teeth are much less menacing than her friend's sharp canines. Still, her smaller figure and large back legs make her an adaptable creature capable of escaping predators if needed. At the end of her body is a long, bushy reddish-brown tail that twitches occasionally especially when nervous.

She is extremely intelligent and has an unquenchable search for knowledge which she tries to satisfy by reading obsessive amounts of literature. She's also known to be more passive, peaceful, and docile and tries to avoid situations of conflict and violence. She is quite shy, unsure of herself, and is easily intimidated by others bigger and stronger than her, but is currently starting to be shown to develop a sense of confidence. Hyzenthlay only wishes to be accepted and has yet to prove herself.