- You may be looking for Hanne Neumann.
Her father encountered the Solitract plane through a mirror in their house. Having taken the form of her late mother, her father stayed in the plane for four days, leaving Hanne with only some food in the fridge. Erik bordered up the cottage before he left, and set up recordings of monsters around the cottage so that Hanne wouldn't leave the house.
When the Doctor, Graham and Yaz stepped through the mirror, she was left with Ryan, who she disliked due to asking if her father had abandoned her. She slammed the door on Ryan and knocked him unconscious and left through the mirror.
When she reached the Solitract plane, she refused to believe that the Solitract, that had taken the form of Trine, was really her mother and thus was expelled from the plane.