Sounds solid.
I have a VERY rough idea of a 'military brat.' Quiet and kind of ominous, intense. Has access to machine guns and attack helicopters and access codes for the orbital laser satellites...because dad's in the Army. May have to answer to Dad if collateral damage exceeds a certain threshold. Dreads being sent to 'military academy.' Has no actual interest in war or military things, but has absorbed a lot of incidental knowledge by simple osmosis.
Or!
Maybe a super popular 'hip' kid who is secretly a huge nerd, but who fears using his nerdy powers lest the secret come out. Or, maybe more interestingly, maybe a person who maintains a separate 'hip and popular' and 'nerd' identity, and is his own archnemesis.
Hmmm.
You can do crazy things with BESM. I will have to peruse and see what comes together.