Marianne appears in the episode Truth of Mistake. She goes undercover as the granddaughter of the Standtall Federal Bureau that is staying at Cliff Schezar's residence as a guest.

While she is there, someone with blonde hair in red is believed to be sneaking about the mansion. In reality, Marianne is revealed to be the suspect and is a Marshall looking for proof of Cliff's corruption.

By the end of the episode, Marianne is impressed with Vash's skills and states to Meryl that she could "really fall for a guy like that", whereupon Meryl disagrees. Vash laments that it could have worked out, if not for the fact she would have arrested him if he confirmed his identity.


Marianne pretending to be the granddaughter of a wealthy official.