Put them in order of preference, from best to shittest.
Pic related is mine.
PSD with movable tiles: http://a.pomf.se/ghxohg.psd
References and names for googling will be provided next.
Probably a boy's voice, but since he probably didn't reach puberty yet, not much of a difference.
It's not like Akatsuki who had a manly body and would become manly-voiced over time.
Do not talk down on best girl.
Also there should be pumpkin girl too.