Valerie with Marten's voice

It came out in Marten's male voice.

"Now, Mr. Martens, would you say we were just pranking you or what?" Klaus could not prevent a chuckle from escaping his lips.

All the while Marten's was trying to get his (her?) bearings as he looked at his reflection in the nearby computer screen. Finally he realized what had happened and turned to Walter and Klaus.

"You made Valerie out of me!?" Martens brought out in disbelief.

"Yes, indeed! I hope this is not a problem?" Walter giggled while posing the question.