"For you, as your blood was originally angelic, the demon blood would neutralise it, leaving your blood a mute grey. For your physique, you only see small changes, mainly muscle buildup. Not a lot though. However, physical strength is increased, stamina is increased, and your existent powers would have been amplified. You may also have other powers, but that varies. However, second blood added will take a large toll on appearance. So, as you can see... You look a fair bit closer to how I look. Apart from that... Not much."