User blog:Night Fury/The unknown SPY

In the latest manga chapter, there is a SPY that the characters continue on talking about. Some people suggest that this spy is somehow related to the eye that can be seen in chapter 327 page 7. Fans first thought it is Tsubone, but after chapter 329, it is revealed that she is also followed by the "spy". Who might be tailing Tsubone? And could it be possible that Kalluto is the "spy" here?

I'm just curious because there are many fans wondering about the same thing.