Snowbell, sometimes called Snow, is the deuteragonist of the franchise and a former antagonist in Stuart Little. He is the Littles' pet house cat and Stuart's best friend. Even though he initially hated having "a mouse for a master" in the first film, Stuart eventually grows on him to the point where they repeatedly risk their lives for each other.
Throughout the movies and the series, Snowbell's depicted as something of a lovable coward. He often focuses first and foremost on his own needs, and frequently gets in trouble as a result.
Little is known about Snowbell's past, except that he has been in the Little family longer than George. He is a pearl white Persian cat who has many cat friends, including Monty. He is also very protective of certain family members, mostly Stuart.
Snowbell is seen as a nice and timid coward.
In Stuart Little, Snowbell despised Stuart at first and lunged to eat him shortly after he arrived at the Littles' house and looked at the pictures. This prompted Stuart's parents to yell at Snowbell and demand that he spit Stuart back out (to which he does), and Frederick picks Snowbell up and sternly tells him that he shouldn't eat Stuart.
- Snowbell is sometimes thought to be the main antagonist of Stuart Little and the tritagonist of Stuart Little 2. Both of these rumors are definitely not true.