In a world of chaotic magic though, you also have to factor in the potential side effects of jailing someone with uncontrolled magic.

It’s very possible that jailing her could make things worse, potentially producing disastrous effects.

I’d say banishment would be more practical, ideally sending her off to somewhere where she can get help. At least temporarily relocating her out of range of harming others, then promptly sending messengers to kingdoms to find anyone who may be able to help her with her powers.

While of course still keeping her supplied and having a liason between her abd the kingdom, so she isn’t totally isolated, and keeping her updated on attempts to locate help.

Of course this should’ve been done long before she was a grown woman, she should’ve had a teacher found when she was still a child, instead of just locking her up in her room forever.

I’ll keep it a headcannon that this was reasonably the case, that her entire childhood in isolation simultaneously had messengers desperately searching for help far and wide, and they truly just never were able to find her a teacher or anyone who knew wtf was going on and could help, her powers were just that esoteric.

Anything less wouldn’t make sense, but perhaps wasn’t worth spending screen time on…