Fatal has a lot of brotherly love for Papyrus, although he is cold towards his created brother known as Patch.

However, his love has turned into an extreme, where he now goes to any measure to get Papyrus back, even if it means breaking apart universes. He is not unwilling to physically harm anyone who gets in his way and is not one for listening to explanations.

He is emotionally very damaged, and Patch describes him as often having very emotional moments.

His glitched speech is difficult for others to understand, causing frustration and confusion to both sides in any attempts to talk to him.

He is forced to see all the multiverse's code at once and can never die, causing him constant pain.

He still has the white clothes, red scarf, and giant gash of Geno, but he no longer has the glitch covering his right eye, his T-shirt is black with green lines of coding on it. His scarf and blood have white coding lines, his left eye is completely blue, and his right eye is entirely red, again, both with white coding numbers in them. When he speaks, there is no text box, and his text repeats overlapping in red, blue, and sometimes yellow. He also has cyan and red glitches surrounding him that he cannot control, much like Error. The more emotional he gets, the more his texts repeat, and the more glitches appear around him. He still has blood dripping from his mouth. the extremities of his hands, legs, and head are darker and have a static-y, file-grainy, dusty appearance

voice refs
our fatal VA:https://youtu.be/H0BTzreuzis

comic sans tv:https://www.youtube.com/watch?v=Y4gnk-UEpEc&list=PLB1iOyaN72zDtlsfd6Z1gmWrd4wENHZKc&index=3