So I took a break from catching up on lectures and made Mordred. Don't know if he'll feature in my eventual Sims story thingy, but he was fun AND unlike most Sims 3 children, he doesn't look completely like a turnip! He just looks sort of like a turnip. Well done me. :P
That hairstyle is really unfortunate, but the range is limited. I may work on him further, to see if I can make him more creepy. However, the traits I've given him are:
Evil, Genius and Loner
Hopefully he'll be an interesting play.