The side of me that demands "recompense be paid" wants to see Lemon punished consummate to what she put every other Magical Girl she prosecuted went through, all at once.
I also realize that's me being incredibly vindictive and petty toward her specifically for her part in doing to so many, beyond what we've seen in this manga. I also realize that it makes me no better than Lemon, in a way, by demanding what amounts to vengeance over "actual justice".
But I also suspect that our protagonists will undoubtedly save her, and my hope is that maybe Lemon gets a wake-up call as to the horrific system that she works to uphold - and maybe my suspicions about the Court itself being the "final boss" for the MGs all over will end up being true.
But if she doesn't show any remorse for her part in terms of the humanistic sense of things...then yeah, I'd want her punishment to be "everything you made happen to everyone else, done to you at once" or something.
But more seriously in the spirit of the actual manga itself - I do wonder how she was defeated, and how exactly this trial will take place (as in...who the prosecutor would be, and so on).