Made me think about what you have said earlier about Djinn. How they choose an important metal item to inhabit. The importance here probably works the same way as with mana generation. Agneyastra, being closely connected to universally known Agni and their empire, a war veteran and one of the several electors of the new Agni emperor, is quite a significant figure. So she can hold three Djinn powers. While Mitra is basically nobody: she is mere several months old with no reputation to her name. That's why Jade was doubtful about whether Mitra can hold any powers. And if this is true, we can just ask a Djinn if Mitra is important enough yet, I imagine they should be able to sense this kind of stuff.
Technically, only two, unless we '[REDACTED]'.
And this is an...interesting theory. But here's the thing: I don't doubt that Mitra could store a Djinn. That's not really what I'm doubting. What I doubt is that she's an acceptable target for the spell that's the source of a Djinn's power. I think even Astra only gets part of it, even if it's the largest part, because the Djinn still apparently have some magical aptitude afterwards, which they previously lacked.
While the Djinn themselves were mostly somewhat important individuals before hand, I don't think that was a requirement for the spell. The thing is, we're ripping the spell from it's foundations and grafting it to our target's soul, from what I can tell. Astra's soul seems to be compatible for some reason, possibly due to Al-Hazard bullsh*t, or the similarities to Unison, but either way, I suspect compatibility with the partial form we can Spellsteal is somewhat rare.
If we knew more about the spell, we could know for certain, but the Djinn weren't experts in magic (for the most part) before their conversion, and the spell's creator is...difficult to get in touch with, to say the least. That's why I'd like to study the spell more deeply, before trying to graft it to anyone but Astra, or, perhaps, Rein. The Book of Darkness is designed with some amount of modularity, after all.
I'd also like to study Spellsteal in more depth, since it's a spell we pulled completely out of thin freaking air. Between researching the Djinn enchantments and Spellsteal, we may be able to figure out the secrets of how to grant Astra another Djinn power, as well.
In that case I think the transfer would have a greater chance of success if Nanoha manages to beat the Dijin's tests on her own. Without doing any dungeon bypasses.
Maybe, but I'm not so sure. Astra's compatibility could be due to a variety of factors. We don't know enough about Unison, Djinn Equip, Astra's design, Spellsteal or the Djinn enchantment to say for certain, and I'd like to be as certain as possible.
