X-Tale!Papyrus is the brother of X-Tale!Sans, an apparent son of XGaster, and a trainee of the royal guard. X-Tale!Sans appreciates him despite multiple problems with their relationship, however, he agrees that his father is a traitor and should be disposed of in favor of the X-Event. Even though Cross ends up killing everyone with his Gaster Blasters, he spares his brother from death, but he refused to clam in on him, leading to his death by Cross. Since then, Cross has sworn vengeance to get him back.
| X-Tale: Cross | X-Event!Chara | X-Event!Frisk | XGaster | X-Tale!Papyrus | X-Tale!Undyne | X-Tale!Toriel | X-Tale!Asgore | X-Tale!Asriel | X-Tale!Mettaton | X-Tale!Alphys