In the prequel season, StarFinder is seen breaking into Soul's house (in episode 13). Also, in a deleted scene / out-take (after the credits of episode 13), he admits to placing a block which apparently caused a bolt of lightning to occur, disrupting the action.
Yandere High School Edit
StarFinder is a Yakuza who is brutally executed in episode 71 with a headshot from Taurtis' Dragon Wing gun. The power of this legendary gun caused StarFinder's head to explode and be blown off his shoulders. This incident happened during a failed robbery of the convenience store.