>>49595267
I was going to say Artificial Dream in Arcadia since it has every Touhou as a playable character but it's a stretch to say most of them are in there in a meaningful capacity in terms of story. Still, you can recruit Kotohime to your party early on and power her up to keep her useful throughout the entire game with sacrificial fusion and skill transfers.

>>49571002
>YuugenMagan
My man, I don't know what it did to your penis but I promise you it wasn't paizuri.