Number 12

I think unless this is a Promotional Poster...

The Character with Daniels has to be somewhat a main Character and not throw away one... this rules out Rigby who gets infected during the day and dies on the Drop Ship before Dark... (but we dont know how many days the scenes are set).

The hair is not like Crudrups.... his is longer at the back and more volume... the person in this photo, has short Top and Sides and sides to a grade 3-4 clipper size....

could it be Bichir Character? clothing looks lighter, and no signs of grey hair but its a low resolution... i will when i am not busy edit that photo proportions to make them straight and gauge the size... But Bichir  is within the same ball park as Waterston...

But so too is Franco..... the only thing that puts doubt on it being James Franco is the rumor he dies off screen.. and only appears in flash backs... (Cop out really)... But nothing officially or from the Actor has hinted at his role...

The only supporting evidence to this rumor is the Cryo-Pod Scene where we see one has no lights on and looks failed..

It could be Walter...?  who knows..

I think it has to be one of  Crudup, Bichir, Franco or Fassbenders Characters... or its someone we have not seen on the cast list so far.