GoldSaw said: Kinda like a Mokou and Kaguya thing. Fighting is flirting.
Well, when you live indefinitely, being too close and lovey-dovey would get very boring really fast. Having a little artificial/trivial conflict spices things up. Gensokyo as whole basically works like that with all its incidents.
Its funny as that kind of mindset suddenly makes every rivalry and friction-filled interaction somewhat suspicious.