Lady

Lady is an 0-4-0 steam engine who spawns in the Bedroom on the wall facing the Living Room, just adjacent to a broken vent. A variant without her face, reflecting her time in Muffle Mountain, can be found on the other end of said vent, in the Living Room. Due to a bug in the collision of the track piece directly in front of the spawns of both variants of Lady, she can de-facto not be used.