Two big things come to mind: firstly, he's from the US for no reason other than... being from the US. It's a nonfactor. It's... honestly something to be avoided, particularly with his reason for transferring being so flimsy.
Secondly... that's totally wrong about why the original artefacts that later Divine Gears mimic are important. They were literally made to be supernatural; the wielder isn't a reason for their importance. 

More minor points I've observed when reading it: you've called out flat feet and a heavy skeletal structure, and then made his other abilities... the total opposite? Capoeira? Dancing? Highly agile? That's completely contradictory. Why is street-fighting even there when he knows two martial arts and apparently has a happy and normal life? O_o