Stolen by the Fae and taken someplace I don't know. I'm following so far.

[Really Yosuke, you'd think the fact that he is taking it so calmly would be a clue that maybe, just maybe, he's not David Bowie.]

Rowan and iron are common in repelling the Fair Folk, yes. [There might be a hint of distaste in his voice there; he is absolutely not touching iron if he can help it.] I presume this crumbling temple to be the place of this Guardian?