[lily.]

I think he uses his intelligence and maturity to his advantage. He is quietly scheming. A lot of it goes un-noticed. He is exactly what Science said he is. Science was the only other HM who could match his intelligence, and he was the one who figured him out. Unfortunately, by that time, nobody was really listening to Science on account of him shouting his way through the house all the time, so Derek continued his game, and turned that situation to his advantage by claiming that Science was "barking mad".

He is definitely a Dark Deceiver. Whether the public want that or not remains to be seen. His ways have not gone un-noticed by the viewers, so it will either be his downfall or his victory. You decide <---Marcus Bently voice!