[tremault]

marcus revels in the mental challenge.
he looks for an opportunity to catch people out and expose them.
he is a very observant and clever guy.
he may be a bit of a dick at times but you have to hand it to him, when he gets into a proper discussion with someone, he is pretty damn good.

he is spending time with bea because he is genuinely a caring person. he sees what a dickhead she is and he is actually helping her by being around her. he is pointing out things that she does that gets her into trouble and also being a friend when she is so in need of one.

for someone who spend such an amount of time alone, he is probably the one in that house that has most loyalty among his friends.