For the main character you need to make sure the hair is easily posable (thank me later). you don't want her hair sticking into the air when she is looking up for instance. I have literally rejected hairstyles because they don't have great options for posing them. Or go with a updo hairstyle saves a lot of trouble. (my female lead will often wear her hair in a bun for instance)
I agree with the other poster that you might want to make her stand out a little more (although I might not be the best example there). It is probably the first your players will see when they check out the game. If not by the banner of the game then by the screenshots where she will most likely feature heavily. (Not that she looks bad but there are a lot of similar girls in these type of games out there. which might make it harder for your game to stand out.) When looking at games to play I go by screenshots first, then tags and if you have convinced me so far I will read the synopsis and make a final decision to play or not play the game. So there are a lot of steps before I play a game and you need to grab my attention at every step.
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