You can ask her why she tried to kill you on her romance route.
Thank you! Is she behind all the murder attempts? ( The one in Week 5 and Week 6?) Because I imagine she did it because of Revaire politics ( maybe she thinks we are part of rebel forces), but I think she is not behind that assassin...
I can confirm that as scheming as Gisette is, she is not behind everything bad thing that happens ^ . ~
