For one, Herriman is a warrior who's fought to prove himself to his god for around a century. He's also got the help of those mutated eyes. He didn't disappear as he was struck, he disappeared just before. It also helps that he was totally expecting Mifune to swing. Remember that the blind charge was only an act, in order to get Mifune to strike him so Herriman could counter. 

for two, I DID specify. Herriman came back in as Mifune was in halfway through the leap. Halfway, as in you've reached your peak height from the leap, you've got your feet off the ground, and are just about to start coming down. If you thought halfway into the preparation of the leap, you were mistaken.

Thirdly, Herriman had been building the energy to phase out for two rounds, and he was helped by the fact that Mifune decided to take actions to slow his charge even more. He did the same move against Priroda at full strength, and she managed to avoid it, so don't say it's OP. Also, unless if you can specify the point where I Godmodded (as in, took control of your character against your will), I'm pretty damn sure I didn't. You're just throwing around words like OP and GMing to make me sound like the bad guy here.

Also, being a samurai doesn't give you the magical powers of hearing the swings of a less disciplined fighter when they appear mid-swing. Once an object starts moving in the air, it starts to produce noise, and that noise builds up. In this case, Herriman's axe comes in halfway through a swing, starts to build up noise as soon as it enters (damn near silent, sinc it literally just appeared) and then it build up the noise associated with a sword swing as it moves. I never implied Herriman's swing was silent, but by the time you hear it, it's probably already hit you. Also, we're not fighting in a silent environment, remember there's a giant ass cheering crowd.