Fatal has been described by Xedramon as a Geno who has lost everything, including his own mind.
The only thing he seems to have kept normal is his brotherly love for Papyrus, his created brother known as Patch.
However, this has turned into an extreme, where he now goes to any measure to get Papyrus back, even if it means breaking apart universes

NOTE! : Fatal's voice should be sound like normal sans but deep, Fatals voice should have its own glitched out voiced effects added to the voice, but be sure that when you send in your audition that you have a version of your takes with the voice effect at the beginning, and another version of your takes at the end without any voice effects.