I like the first one better, but it does lack a bit of black? Maybe giving MC black hair or shirt (or a pattern) could be nice.
And if I may, I'd like to make a comment on the text bubble. The text is really really small and it's really hard to see on the phone, and believe me, you want people to be able to read it on the phone. Also the bubble is blocking off a part of the very cool picture, just put it higher in that free space and make it bigger, it would really help with readability