[quote=@Izurich]

Hmmmmmmm… My headcanon is that grimoires are pretty much self-regenerating and self-evolving or else all magical girls will be dependent on a “grimoire tuner” to grow, which I don’t like.

I think a more interesting angle would be that she’s a “Grimoire Modder” that provides various buffs and mods to enhance and/or modify a grimoire’s power. Perhaps she can also hasten the repair process of a truly damaged grimoire.

[/quote]

That's an interesting idea to consider. Grimoires self regenerating and evolving is probably how they work to some extent indeed. My idea was always to provide a boost to that or fine tune the direction of the changes.

[quote=@TheWendil]
<Snipped quote by KoL>

Or she’s the Librarian. I think this is the route I’m going to decide with.
[/quote]

She was already gonna live in the library and hard ever leave for any reason anyway. Since she has a body too weak to fight in the frontlines.