User blog comment:Gouki Daimonji/Antagonists/@comment-5425938-20140209045306

Where is it confirmed that the Katana user is an antagonist?

As for the other guy in that poster, I think he's a magic world user. One with more skill than Tetsuya. But maybe Katana world. Since each world appears to get at least two main attributes we may see more cases of multiple users per world than what we saw in vanguard