Well, the only proof is that they both share the same IP address. I think that's the grounds for the ban, not the fact that they're the same person who created two accounts... though we're pretty sure Ken = ID279 by now.
Anyway, I have to digress >_>
I forgot to SS the convo, but I spoke with KaiIca (forum name Melica) out of curiosity yesterday. She's a friend and guildie of Celestyal/Sorayah who doesn't believe Sorayah = enzo. I can't check up on the proof cause there's only two SS under enzo's name... so where's the proof that enzo is the same person as Celestyal, and secondly, the proof that she changed his/her name to Sorayah? x_x