Oh, Soldat? Metal arm? That's helpful of them. You can also try Captain Javert. He runs combat training classes over in the village all the time. Used to be part of the police in his world.

[Hell, kid, do both. He's all for it. Sora is more than old enough to be able to fight as far as he's concerned. Rosinante enlisted at thirteen and saw naval combat by fifteen - pretty standard stuff where he's from. By nineteen, Sora's surely plenty capable.]