Trapp is the son of a bandit chieftain. He lives in a shared house with a group of adventurers: Pastel, Clay, Kitton, Knoll, Rumy, and Shiro, a baby dragon. The group undertakes various quests, including treasure hunting and solving mysteries.

An event titled "Rescue Trapp" marks the second episode of the anime, indicating Trapp was kidnapped and required rescue by his companions.

Trapp's father triggers a key story event. Returning from Mt. Terrason, he brings back a precious white dragon jewel resembling one owned by Shiro. This discovery leads Clay, Pastel, Rumy, and Shiro to investigate a potential connection to Shiro's origins. While part of the core group, Trapp is not explicitly listed among the members departing on this specific investigation following his rescue.