[quote=@Kimiyosis]
So, how should I begin?
[/quote]

...huh? From the beginning?

Jk. The incident with the auditorium has just ended, you can just say that Sasha came out of it right now. In this case she would see Addie on the floor (crying with her clothes covered in paint), Rei pointing a gun at Minako, Sayaka point flamethrowers at Minako, Katie being your typical dumb cheerleader a little behind them and finally Minako holding Addie hostage.

Pretty much that.