Ooh, I like that top right hand corner one. It reminds me of Dante and Virgil from Devil May Cry. Virgil being Pitch and Dante being Sandy, they're like brothers (twins I think) but one turns evil (Virgil) but is still a bad a** nonetheless.
Wow oh my goodness I absolutely adore how you draw Sandy! All of them, actually! I really enjoy your style a lot!! The effort and hard work you put into it all is just amazing, there are little perfect details in every single one of these drawings. That says so much! Jack's snow chair at the first one's just a great idea, I like the atmosphere of it being maybe a little lonesome, the great fighting poses in the next one, in fact, poses in all of them. (I'm terribly sorry if that was a run-on.) And the way you color, highlight and shade . . . I feel like I should just bash my keyboard to express my enthusiasm. I'm thoroughly impressed!