Sakura Clicker Allies

Sakura Clicker is a simple free to play PC game. Here's a link to Steam store page, since I don't know the link to official site.

I'll just quickly mention the unlockable allies that I know of:
Choyo, Dai, Ima, Jin, Kaiyo, Mari, Kiyo, Nishi, Tori, Izumi, Karou, Hoshi, Kagami, Tamiko, Asako, Chiyo, Azami, Takeko, Mikazuki, Chou.

Here's an image I pasted together.

Direct link to full size image