Board Thread:Speculation House/@comment-92.232.230.34-20130719223612/@comment-12227301-20131215021213

My guess is that the simple soul of the song reffers to Jean. That weak and unimportant guy with no special tricks, and an aura (manifestation of a soul) that does nothing special except being too much.

I mean, if there is a simple soul in the series, and if a literal "soul", with nothing else factoring in, is truly strong*, that is in both cases Jean.


 * Pyhrra mentions that Jean's Aura (and thus soul) is remarkably aplenty.