I think it is easy to say that anything having to do with Xenogears is a labour of love. I am compiling the character songs for the Xenogears characters. Miang and Ramsus get a combined song.. because I found the PERFECT song for them. (If you want it, superfi, I can send it to you).
I already got Citan's song (even though it is hard to narrow it down with him at least in my mind). I needed to get one that adequately fufilled his role for the game. Fei's song is already picked out.