Agree with Conan Face on this one.

Focus on one Girl guys, there will be fools who WILL use real money to spam their one and only character.
Personally - I dont get the hype for Orchid, sure she is cute but her voice acting is unpleasant to me personally and her personality is rather bland. And that pet ant is kinda silly as well.

I already wasted 250 tickets on Alpina before knowing about the Rarity upgrade for the girl. After that, all my points are going into Cepha,
After all - focusing one target down tends to be the best strategy in most games. In this case focusing on one girl gives us the best chance to push her through over the paying fanboys/girls.