Mister Duo is an abberant that resides in the pink void and cannot move on from taking care of a bunch of children. He answers their every desire with endless food and toys. A small, secluded world living with the consequences of having way too much starlight. They are gaussians that have never seen a spec of dirt in their entire lives and someone needs to come over there and rough house them before they enter a point of no return.

Mister Duo is also a chimeric heart bound to multiple people at once unlike the usual chimeric hearts, which gives these children a bit of power each.