1. German word meaning "Guilty"
2. In <i>Weiss Kreuz</i>, the red-headed German member of Schwarz(the rival assassin team of Weiss). Schuldig is not his real name, yet it's never revealed what is. He's a telepath and he's very manipulative and sneaky. He also has the gift of speed.
You first see Schuldig(and the rest of Schwarz in episode 8: Raubtier.
Many fangirls like to pair Schuldig off with either Kudou Yohji or Brad Crawford. Usually, if he's paired off with Fujimiya Ran it's generally non-con. But not always