Mei

She exhibits an energetic happy-go-lucky persona when interacting with guests but can give out a threatening persona to put unruly people in their place. As long as she's facing a paying customer, she doesn't care about race or origin, whether Human, Pantheran, Demon or even Fallen, it does not matter to her. She further doesn't care what customers do in their rooms so long as they don't bother their neighbors, or cause property damage. When Diablo openly declares his intent to "torture" Rem, and Rem objects, rather than be concerned about the torture, she's concerned that Rem's being too loud.