Character Analysis
AP Shelton
AP Shelton is one of the assistant principals of the school, and he's got little presence in the novel. Sure, he tells Trina that her outfit is inappropriate, but he doesn't really do anything about it. We do end up cheering for him when he tells Leticia to go to class after she tries to get him to do something about her broken nail—but when he asks Leticia if she knows anything about the fight, she gives him nothing.
Bea
Leticia's best friend, Bea participates in a work-study program through school, where she works one week outside of school and goes to school the next week. But really, she functions as Leticia's powerless conscience. Clearly, Leticia doesn't listen to her. Bea could have done something about the impending attack, but she either chooses not to or doesn't realize that she has that choice available to her.
Chem II James
James is Leticia's crush. She only sees him in Chemistry class, and she cares about her appearance in front of him. James seems like a nice enough guy—he smiles at Leticia, asks about her having band practice, and tries to give her a quick back rub. Too bad Leticia can't revel in any of it because her conscience is eating away at her.
Coach
Dominique's basketball coach, Coach takes no guff from anyone. She's a strict taskmaster and requires her athletes to get Cs and above to play. Even though we appreciate her high standards, we sort of wish she would at least listen to Dominique to help the poor kid feel visible.
Ivan
Ivan is the most fleshed out peripheral character. He even gets his own chapter. Sure, it's in part because Williams-Garcia needs to fill the reader in about what Trina's going through, but her choice of narrator is also important. Ivan's one of Trina's classmates in Art, and he may or may not have a crush on Trina. Trina thinks he does, which means we kind of doubt it. But… he does show up at the hospital and sit with her for a long time. So maybe Trina's not as out there as we think.
Art's the last class before the end of the day, and in it, Ivan and Trina draw each other's portraits. And Ivan really makes Trina mad—his drawing gets her out of her perfect little bubble, and she doesn't really like it at all.
Trina doesn't even consider Ivan a friend. When she's calling out to all the people as she's being attacked, she doesn't say his name. But it's Ivan who comes to visit Trina and Ivan who stays with her even after the nurse tells him to get going. He brings her a card signed by people in the school, an indication that she is at least cared about by people, if not to the degree she likes to believe.
Shayne and Viv
Shayne and Viv are two of Dominique's friends, and they're with Dominique when the basketball guard decides to jump Trina. Both girls end up egging Dominique on at lunch. Too bad they don't try to stop Dominique, but they're definitely followers, not leaders among the trio.
Scott
Scotty is sort of Dominique's boyfriend. We're not sure how he fits in. He hangs around Dominique at lunch, but that might be because she had mad, angry sex with him one time and he's hoping for more. He's a good-looking guy, so Trina notices him and wonders why he's with Dominique.
A Variety of Teachers
The teachers in the high school in Jumped run the gamut of types. Some of the teachers, like Ms. Fenster and Ms. Bauer, seem to have a pretty good rapport with the students. Other teachers, like Madame LeCoeur and Mr. Sebastian, expect their students to work and are hard taskmasters. And even other teachers, like Delmonico, show a passion for their subjects.
Regardless of their teaching styles, the teachers are all peripheral. Which is kind of true to how high school really works. Teachers want their classes and curriculum to take center stage, but very often students are much more concerned with themselves and their own wants and needs, not what's happening in their classes. Sorry, teachers.