Trina Echolls is first mentioned offhandedly by Aaron Echolls in the episode "Clash of the Tritons" in a conversation with Keith Mars about the fallout from his affair. AARON: But these stories are tearing my family apart - my daughter Trina is the only one who will talk to me anymore. The next episode "Lord of the Bling" provides a thumbnail sketch of her character as seen by Logan Echolls, in a scene set at Lynn Echolls' funeral. TRINA: She was your mom, my step-mom. The lady who liked to parade through the house in a string bikini whenever I had a boy over.