Cross is a major character of the XTale and comic and Underverse, where he serves as the series' anti-hero. In XTale X, XTale!Sans was a trainee for the royal guard who began experiencing issues related to his code; which is actually relatable to The X-Event's cause. After he seals their main soul within him to result in XTale corruption, and his realization that he couldn't overwrite, he finally obliged to follow Cross!Chara's orders. During Underverse Season 1 he appeared as an antagonist causing chaos across the multiverse, first stealing Classic!Sans' soul, then making a deal with Nightmare to emotionally hurt people to be able to travel to AUs to take their core codes back to his universe. But in Underverse 0.3, during a confrontation with Team Sans, after he was destroying Underswap, he was defeated and got his stolen soul taken away, erasing him from existence once X-Event!Chara got a human soul. However, at the end of Underverse 0.4, XGaster revived him and offered Cross to join him and his friends. XTale!Papyrus – his brother XGaster – his creator/adoptive father XTale!Frisk – his former best friend XTale!Chara – his former other side, frenemies (friends and enemies at the same time) Epic!Sans – his best friend
