I know it's not much, but he's not really used innrp's that much (and when he is, twin kills him off quickly cause he /hates/ him) So this is the info we do know. He IS Akiko's older brother and also the one responsible for her dying and having a fear of water.
Fuyuki Minonkai (C) =Lifes-Lovely-Roses
OC Sheet (C) =Lifes-Lovely-Roses
Bleach (C) Tite Kubo