Monster Kid is a young monster who stops at nothing to see their idol, Undyne, in action.
Monster Kid is an armless child, with a tendency to fall over. They are quite optimistic in the pacifist route, and follows you around in the Waterfall area. So far its gender is unknown. They look up to Undyne, and idolize her. The first time you meet monster kid is in Snowdin.
List of AUs with Monster Kid