Let me toss a few names into the ring and explain why I like them: 'misfit', 'wallflower', 'outsider', and '
scapegoat'. Each of these carries a different emotional weight, and the one you pick really colors how the audience reads your bullied high schooler.
If your character is
quiet and almost invisible—someone who watches, takes notes, and rarely speaks—'wallflower' is perfect. It's gentle and sympathetic; it evokes '
the perks of being a wallflower' vibes without being melodramatic. For a kid who tries to fit in but can't, 'misfit' is kinder and a little wistful. It gives room for growth and empathy. 'Outsider' is broader and more neutral; use it when the character is alienated for reasons beyond personality—class, interests, family. 'Scapegoat' is darker and explicit about victimhood: they're targeted not for who they are but because others need someone to blame.
Stylistically, I choose 'misfit' when I want readers to root for a slow, warm redemption arc; 'wallflower' when the tone is introspective; 'scapegoat' for harsher social commentary. Picking one of these shifts your story's emotional center, and for my tastes a little nuance goes a long way—so I usually lean toward 'misfit' or 'wallflower' unless I want to lean into tragedy.