User blog comment:Xilinoc/Ch. 572 (inb4 "Kenpachi doesn't have Shikai")/@comment-6073876-20140313162728

there are FIVE sternritter that already show up but didn't reveal their letter, those FIVE are: 1. Kyoraku's opponent 2. Ukitake's opponent 3. Shaz Domino 4. THIS KID 5. Unnamed (the one who watch the fight between Bazz B and Jugram but stopped by Askin)

and letters left are C, L, M, N, W and X.

maybe this kid Sternritter L or M or W L = The Lies M = The Mind W = The Words