Marianne

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.