As Nero flipped backwards, negating the momentum of the redheaded man's rebuff, he came to the conclusion that the man was definitely a Mystic. While Arcanists were definitely stronger than Initiates, the difference should not have been so drastic - at least not without the Arcanists using the Arcanist form!
No matter how Nero attacked or probed, using strength, speed or both, the man always blocked it easily, and with a single hand, all without so much as taking a single step back. Now that was just unreasonable!
After all, regardless of how strong the redheaded man was, his weight should be normal. Moreover, him being strong doesn't negate Nero's strength, so blocking Nero's full strength strike should at least cause him to stumble or take a few steps back. Being unhurt was one thing, but not even being pushed back was entirely another.
