Imagine someone equally as athletic, but barely fifteen, four inches shorter than me, and with the stupidest spiked green hair you've ever seen in your life.

... Then tack on the best tactical mind of our entire generation, enough martial arts skill to take down any four of the next best out of the dozen or so best fighters Auldrant has to offer, and the second best talent for magic in the world to boot.

That is Sync the Tempest.

[He sounds somehow both annoyed and fond, and possibly also a little afraid.]