"i'm mae. mae the skeleton."
– Mae upon meeting
She is very lazy and punny. She often falls asleep during work, much to the behest of Red. She hates making promises, and likes drinking chocolate ice cream sauce. She often eats at Bratty and Catty's diner, which serves ice cream and junk food. It is revealed if Red is killed that she is very observant. She is depressed and apathic, as revealed in her battle at the end of the Genocide Route. She is a close friend to Asriel, Red and Monster Kid.
She has white bones and no hair. Her pupils are white hearts. Her fingers levitate over her actual hands.
She wears a purple hoodie over a white T-shirt/Sweater, black basketball shorts and red sneakers/slippers.