Park Jay, human and a cat, taller than Erin when he became human, has a charming voice and smile, protective, watches what you were doing, observant, good-looking, has a sharp jawlines, calm and quiet, pouts when sulking, can transforms into a cat or human anytime he want, cold, nonchalant, careless, stubborn, arrogant, actually smart, attractive even though he's doing nothing, handsome, independent, indifferent, aloof, self-esteem, doesn't know expressing himself, protective