Butter - obese, diabetic, social outcast, plays saxophone, sarcastic, sympathetic, straightforward.
Anna - love interest, most popular of the school, genuine, caring, beautiful
Friends
Tucker - amicable, determined, knows Butter from fat camp
The Professor – music teacher, finds Butter a brilliant saxophone player
Parents
Mother - worries too much, overfeeds, overprotective.
Father - stopped talking to Butter, stern.