The vampire probably should have waited a few moments longer, but he didn’t. Choosing the moment his back was turned to attack low and fast.

With this one though, the odds were high that such a tactic was already expected. That the whole leaving set of motions was a cover, an act so Kamui would start moving, even though the chances were high he still went for it. This just could end up with him gaining some wider and deeper injuries during the process depending on what the human pulled off.