Luna is not a tease! Shes' a flirt!
Well no, i'll probably explain it in the RP, if she ever lives long enough.

But about the duos...
I wouldn't count Hifumi and Celeste as one, considering she lied and bribed Hifumi to do her bidding. Besides, its never said if they were friends before the incident.

@Savo
A triangle? With whom?