I'm assuming this is a troll, but... c'mooon. I imagine he is wearing a cloak because his armor has a lot of edges that sand could get stuck in. He may not want to be noticed as a Spartan by immediate sight. He has a crack on his visor. Seems reasonable to 'keep it clean'. Halo and Destiny are respectively their own franchises with their own ideas. Cloaks belong to no franchise. Also.. Long live Halo!