Viktor Fallenstein has black hair that has a grey streak that goes from the tip of his bangs to the end of his neatly trimmed hair. Viktor has the signature mad scientist laugh that he doesn't see anything wrong with. In his lab, he wears a sleeveless lab coat with a black turtleneck (the same one he wears in casual attire), black gloves, and lime green tinted goggles (green is his favourite colour). His casual attire is just a tight black turtleneck, dark green pants, and brown boots.