She may have feelings for Timmy; however, because she is one of the popular kids, she can't show it if it exists because the other popular kids hate Timmy.
However, Tootie has the exact same hair color as Trixie.
When Timmy decides to end their relationship, an angry Trixie chases him through the outskirts of a mini mall in her attempt to kill him using sporting and gardening equipment, including a helicopter to slice him in half with the propeller blades, since the missiles were sold separately.
Aside from Timmy briefly mentioning this, not much else is Channel Chasers ", it has or Trixie's early school life that she is the mother of Timmy's children based on. Her father is a short balding man with glasses.