In her initial appearances, she seemed to be soft-spoken, and rarely made speaking appearances. In "The Fan," however, she is revealed to be highly delusional, and somewhat eccentric. She is somewhat of a stalker, as revealed in "The Fan." She seems to see things played out as a sort of sitcom, with herself as a character, even carrying around a tape recorder that plays a laugh track, and accompanying music. Sarah is also extremely obsessed with Gumball and Darwin, whom she views as her only friends, and appears to also fantasize about marrying one of them. Gumball and,Darwin were the first people who spoke to her at Elmore Junior High.
- "The Banana": She is in Mr. Small's class.
- "The Voice": Sarah has her first speaking role in this episode. She is seen eating her lunch on the school stadium benches. Gumball and Darwin apologize to Sarah for never talking to her and actually having something to apologize for. She then makes her head fall off.
- "The Sweaters": She has her first major role in this episode. She has transferred from Richwood High, and she compliments how "hardcore" Gumball and Darwin are, which inadvertently causes rift between them and Carlton and Troy.
- "The Finale": She gets knocked over by Gumball and Darwin in school, and later, she is among the angry crowd attacking the Wattersons at the end of the episode.
- "The Fan": Her second major rol is Gumball and Darwin's number one, crazy obsessive, fan.
- Sarah appears as the first new student of Miss Simian's class.
- She seems to be one of the tallest girls in school (excluding Tina).
- According to character models, she was originally named Dolly.
- She had her first speaking role in "The Voice."
- She was originally a student at Richwood High, which is odd as she now attends junior high.
- She is named after the show's producer, Sarah Fell.
- Despite being considered a new student in "The Sweaters," she appeared in 13 episodes before it.
- Her middle initial and surname are a play on "gelato," the Italian word for "ice cream."
- She is a mangaka, a person who draws manga.
- She is apparently also a cannibal, as she is seen eating a vanilla ice cream cone in "The Fan," "The Law," and "The Butterfly."
- She is maybe a vanilla or lemon ice cream.