Okay, so it's done. Rather than changing around the context of the initial post, I simply added on to it with events taking place from a different perspective at a slightly different time.
Though I do have a question (though I probably already know the answer). Does Mina's SU function only as an information piece? I'd assume that to be the case, since she's a commoner, and not in league with the arcana users, coupled with the fact that the creation of her SU was neither advised nor suggested.