Well I don't really like it ( it's not bad though ), I will explain why.
In fact in my opinion it would be better with a brighter " halo " arround the main char instead of this white thing. Furthermore the right side of the sig looks weird compared to the left side, there is no real " action " or such, there is just a char sitting there and we can't really really see the link between him and the other characters. But well, that's only my opinion. ^^