Mozelle is an NPC that can be found in-game, and will enter the elevator. 
Mozelle is a small white anthropomorphic creature in the form of a crude aliased drawing. Her head is a rounded triangle, resembling a beak. She wears a light pink dress and bow, with thin black lines as arms and legs and white circles as hands. When banishing an NPC, her outline becomes sketchy and jagged, and gains angry hyper-realistic eyes.
 Mozelle is generally kind to others, speaking in a formal if slightly pompous manor. She can be very curt when angered and will not hesitate to say something rude if she thinks it's true. She can also be somewhat air-headed, as seen in her dialogues with Lampert. Mozelle consistently refers to herself as a princess, and will sometimes refer to others as subjects and similar titles reminiscent of the Medieval era and the Renaissance. Notably, she seems to dislike being called a mouse. Mozelle uniquely has the power to banish other NPCS from the elevator after talking to them. She has a unique "disgusted" sprite for when she does so. She will use this power to banish both Unpleasant and Reddy, in one interaction.

I see her having a similarly light-hearted and compassionate  voice, who is not afraid to be downright honest (and a little bit scary)  so try to go for that! 

https://regretevator.fandom.com/wiki/Mozelle - Wiki!