Cro-Marmot does not speak, and has very little distinguishable traits. Most of the time when he kills another character, it involves crushing others with ice block. Cro-Marmot is friends with nearly every character, and is rarely ever seen alone.
Because he is constantly encased in an ice block, it is difficult to distinguish his personality. He seems to enjoy ice cream, and has an occupation of selling it.
- In Simpsons episodes, he takes place of Mr. Largo.