Trina is a girl from Michael Morningstar's prep school.
In All That Glitters, she was seduced by Michael Morningstar so he could feed on her, before being zombified by him. She had a very big obsession with Mike and seemed to be very upset when Mike stopped calling her, because Gwen showed up.
In It's Not Easy Being Gwen, it's shown she now goes to Gwen's school, as she's seen in the background.
Ben 10: Alien Force
- All That Glitters (first appearance)
Ben 10: Ultimate Alien
- It's Not Easy Being Gwen (first re-appearance; cameo)