Courtroom Employee

Appearance in Trash Boat
The courtroom employee was a minor character in Trash Boat. She appeared near the end, when Trash Boat wanted to change his name back to Rigby. She told Trash Boat that he had to have $50 if he wanted his name back. She helps a guy named Mr. Butt Cheeks change his name back to Chad as well. Near the end of the episode, where The Urge is trying to break into the courtroom, she seems to be totally bored. Mordecai and Trash Boat grab two ropes and Mordecai shoves one through the door handles. He holds the door shut while Trash Boat goes to change his name back. She stamps the papers very slowly, and then The Urge absolutely destroys the front doors of the courthouse. She continues stamping, ignoring the fact that the front of the courthouse just got destroyed. When she finishes, she finally looks up and notices The Urge, and the other rock star who comes back to kill him. After this, she quietly closes the flaps over her window. We don't know what happens to her after that, because the courthouse gets destroyed entirely at the end. She might've died, but she makes an appearance two seasons later, so she couldn't have.

Cameo in Real Date
When Mordecai and CJ were at the Coffee Kiosk in Town Square, she can be seen walking in the background. This is presumably her last appearance.