There are five main obtainables in the game, although you can also end up with somebody else. 🙂
I tried hard not to make them too cliche, but there are still some points that will probably stay generic. Still, I hope you like them.
P.S. Kaname is the tsundere type, Sonako is the childish bestfriend type, Shino is the Prince Charming, Takashi is the athletic guy, and Satsuki is the loner.