Accelerated cognition. You can check his bio but basically his brain processes things at like 5 times the speed of most people. His reaction time is about 5times better as are his reflexes. He has kind of a sixth sense as well. In terms of ability he's an skilled fighter, and is extremely agile. He's into parkour and rock climbing as well.
@KiritoAsunaWhile he's good at those things the only thing that is above human level is the cognition part, he falls short to those that might have supernatural fighting abilities or have an ability that would allow them to keep up with his reflexes