Cross!Sans

Cross is a short statured monster skeleton, with 2 white irises containing black pupils for eyes. He is shown to have multiple outfits throughout XTale; however his most iconic one is his oversized uniform that he so much hates. The outfit consists a black neck sweater and a big, white, fluffy hoodie, that has a black and white cape sewed behind it, tied up at the middle with a huge belt in the shape of an X. He wears black shorts, marked with 2 giant X's on both parts, held by a white belt at his waist with a X on it, and a pair of white shoes, marked with 2 X'es. The color palette is only black and white, much like everyone else's from XTale. Previously, Cross would also wear a golden-shaped heart locket tied around his neck. During the XEvent, the same attire was kept, just that he would have a red thunder-shaped scar on his right cheek, with a red colored right eye instead of white.

However he did not always have this uniform: before he used to wear a metal suit of a purplish dark grey color, similar to the rest of the casts'. His bandana was no longer just black: the deltarune sign was visible on it.

Despite the regular Sans abilities, Cross also shows great skills in combat, thanks to his years of training during his duty as a Royal Guard in XTale. He knows how to use his attacks wisely and can think strategically, an example would be using his Gaster Blaster and his force to push Nightmare, stalling time for Dream to do one last hit, but doesn't base just around them. He has TONS strength, being capable of lifting a bus, and has a very high pain tolerance, seen as he was still capable of fighting despite having several broken limbs while having tons of stabs and cuts. Cross also presents a "full power mode", which he can obtain only unless XGaster controls him. although not much is seen with this state.

After obtaining the XEvent soul, he might not have been capable of OVERWRITING, however he gained reduced abilities. He was capable of stealing certain parts of different worlds thanks to the HACK KNIFE (who seems to be completely under his control, seen as he could teleport the knife back to him or make it disappear despite it being far away from him), as well as teleport to said worlds if having at least one route acknowledged. One other main ability is also his CODE CORRUPTION, which is actually just an extremely weak control over his opponents. He gives them commands that are executed poorly and slowly done. His code is also seen to be capable of restoring his injures, however not confirmed if it can regrow limbs (though, highly doubt, considering this is an instant heal to small wounds that the body would have recovered from anyway, while limb loss cannot be reverted). Having a high amount of DETERMINATION thanks to XChara, Cross can also refuse death, confirmed by the fact that he survived having his soul stolen, to the limit that his lifespan was reduced to a few hours. He also gained Knife shapped bullets, the same size as his knife. From the looks of it, these abilities can't be used unless XChara is awake. All of these abilities were lost after the XEvent.

Although he had a lot of similarities with Underswap Sans during XTale, Cross throughout Underverse became more like his polar opposite. He's an aggressive, introvert and hostile, with selfish behaviors from time to time, being who also shows howsoever no concern for those that aren't close to him, as he had no problem harming other universes. Cross would resort to violence even to the slightest problem, seeing as he punched Dream twice despite only being offered help because of the guardian's interference in his business.

Despite his cold self on the outside to strangers, Cross has a soft spot for those who he cares on the inside, since he fell into grief for losing his home and family after obliterating them, and resorted to hunt other universes to blindly "bring them back". His main trait that also represents XGaster is his lack of trust in others because of the countless wrong people he put his faith on. However, even with his attitude, Cross never showed any sort of malicious intent like Nightmare or Error, only longing for his universe and desperately trying to fix his mistake.

Some personality traits were also obtained due to XGaster's careless behavior with Cross and XPapyrus when they were younger. They were showed little to no attention by their parental figure, and Cross seemed to be the most afraid of him out of the 2 brothers, trying to be as obedient as he could.