[@Tristwich]

He's not able to divine significant information from her muscle mass and height. I never mentioned such things. He's been in many, many fights and has a good general idea of how fast a mortal is on the battlefield. Two martial artists that have never met before can swap hands and still evade blows in a timely manner based off of past experience, based off of their idea of what a mortal biped can and cannot do. He doesn't know exactly how fast she is, but he's not being precise to within perfect parameters. He has a general estimation, and the rest depends on her body language. If that weren't the case, nobody would be able to react to and deflect a simple thrust, which he did in the same motion as he readied his axe. As in, his axe was ready /when/ he deflected her trident, /before/ she was close enough to hit him. His weapon was ready, she was wide open, and he swung.

I don't see how she could be so fast as to cross the distance faster than he could react and just bear hug him without getting blasted by a ready weapon.