I didn't really use her for the bulk of my playthrough because I liked having Lune to hit weaknesses. However come Act 3, I switched her in to play buff bot for Maelle.
As a result I never really messed with the intricacies of her twilight dynamics, since I just used it as a way to give team members buffs (since the give AP move and the move Ally turn next move together activate twilight).
XI Wiki



