Poison Oak is a dryad of a poison oak tree that lives at Camp Jupiter. She is currently in a relationship with Lavinia Asimov.
The Trials of Apollo
The Tyrant's Tomb

She is mentioned when Lavinia tells Don that he owes her after he tries to abandon her. When Meg McCaffrey asks who she is, Apollo replies that she is a dryad that Lavinia is ‘interested in’ like Meg was with Joshua. Apparently Don got Lavinia to leave her post for a picnic that Poison Oak was supposedly attending, however she wasn’t and Lavinia got into serious trouble.
Personality
Like all dryads, Poison Oak loves the environment and interacting with it.
Appearance
Poison Oak has green skin and green hair, with pointy ears.
Trivia
- Poison Oak is the first love interest to be mentioned but not seen in the series.