Since he isn't "Fuuma" Fuuma, I don't think he would mind him. He would probably get along with him in his I don't actually care much about you way. I don't think he would go out of his way to talk with TRC!Fuuma, but he wouldn't care enough to avoid him either. Like most of the other people around the prison. But if he got too friendly with X!Kamui, there would be problems.