A Gothic Opera, I suppose
I'm pretty much into this duo, although my experience is limited to their anime contributions. Their style is unique (if a little repetitive at times

), their ballads have the elegance, their upbeat songs have the drive, and Katakura is a great instrumentalist as well, I say he really should make more OSTs.

And Arika's voice is amazing to say the least.
My favourite songs by them are Mirai no Eve, Rara Eve Shinseiki, Kinjirareta Asobi, Ankoku Tengoku and Kitei no Tsurugi.
I also adore the entire .hack//roots OST as well as some tracks from Avenger, Marimite and Kaibutsu Oujo
