When I saw there was enough fan art of her to make a whole thing, I thought, "Why not?"

She appears in the first MMZ1, and during one of your dialogues with her, she promises Zero a kiss. There's a lot of fan art of that moment. Interestingly, MMZ3 can only be found using a GameShark.

I think she has one or two official artworks where she appears with all the members of the resistance. Also, she doesn't appear at the base in MMZ2. Jealous of Ciel?