When you perform evil actions (such as embracing citizens) the game automatically changes your appearance. The problem is that, as a vampire, you don't really want to look like a demon with red/black eyes. It just doesn't look human anymore, and logically people would notice. Also the fact that you're the only ekon who ends up looking like this, while all the others still look human, certainly doesn't help. So in short, it would be great if we could keep Jonathan's apparance human regardless of our actions in game.