Cross is a Sans from XTale, a destroyed universe rewritten by X!Gaster. Once a royal guard trainee and Frisk's friend, he opposed their plan to seize "OVERWRITE" and erase X!Gaster. Betrayal, loss, and trauma left Cross sharing his soul with X!Chara, seeking to rebuild his world. To do so, he steals code from other universes, making a deal with Nightmare. Now, Cross stands before you—desperate, broken, and determined to reclaim what was lost.