[Pink Pegasus]

I think he will get really angry at some point and tell everybody to go feck themselves. In fact I hope he does and starts sticking up for himself.

If he gets annoyed or angry at some point so what? I won't think it's a mask slipping, or an 'act' coming to an end. People have different breaking points, some people lose their temper easy, some it takes an awful lot for them to get annoyed because they are just very calm, controlled people, and then some others they just let everything build up and then explode! The third type are not necessary fake though, they are just not good at expressing anger, or maybe they are poor at being assertive so they build up every little grievance until they get REALLY upset and then pop.

I don't know if Callum is any of those types, but I don't think he's fake just because he has been very nice so far. I think the rest of the housemates are just copying Dan. They only started using the same word and saying his niceness was "awkward" after Dan got it into their head and kept saying it.

Maybe he's a prick, who knows? But I haven't seen any evidence of that in the house so far.