This is a Undertale Rp so you can create any character or have the characters that already exist now on to the introductions Gaster the father and the royal scientist he may work a lot but her cares for his kids Sans the oldest he's 10 in this RP Papyrus the youngest he's 6 in this RP this RP takes place in the past when Gaster had not yet fallen into the core in this RP you can be their sibling other parent or friend or you can be your own OC just put the OC info in the chat