4.2 spoilers but it's interesting how Scaramouche and Furina were both made as replacements. But while Ei saw Scara's humanity as a flaw, Focalors thought that's what made Furina perfect.
post 4.2 furina finds out neuvillette said she was 'prone to hysterics' and is like 'hahaha.... yeah, yeah i was wasn't i? it must have been awful, having to deal with me for all those centuries...'
and you know neuvillette is standing there wracked with guilt like
(it starts to storm and furina thinks its because he's remembering how annoying and frustrating it was working with her, and meanwhile neuvillette is three seconds away from throwing himself on the ground and begging for forgiveness)
god, after hearing focalors explain everything, and seeing the "scenes" with furina, i cannot possibly IMAGINE just how hard furina must have been panicking in that trial. imagine living for five hundred years for a single purpose, struggling every day to keep up the charade, completely in the dark about WHY you're actually doing this and just desperately hoping that the person you met in the mirror will come through for you, and then all of a sudden the people you've been trying so hard to protect start turning on you, zeroing in on the one thing that you've been keeping secret for all these years, threatening to undo five hundred years of work. godDAMN, i feel so bad for her...