Monster Kid, a returning character from Undertale, is Snowy's academic partner. An armless yellow lizard-like monster with several lighter yellow spikes on their head and protruding front teeth, they appear older than their Undertale counterpart. They wear an orange shirt with a pocket on the left, brown trousers, and a cross on a chain around their neck. They laugh frequently while speaking and sits in the middle row of Alphys's class, behind Temmie, in front of Snowdrake, and with an empty seat to their left.