This still probably doesn’t happen in the au, but here’s Mari as Monarch, having double-transformed with the butterfly brooch and the ladybug earrings. No clue as to weapon.
Mari, even in these dire circumstances, has a certain inner strength and radiance to her. You can feel that she’s going to win and it’s really only a question of how and when.
On the other hand, if someone else was to lose their other half… well.
(this is the bad ending I’m not that cruel)