He can fight, really well. Being trained under a watcher meant that he was taught different kinds of martial arts and how to use different weapons. In my AU there are way more weapons then what we get in  vanilla minecraft.

Grian's choice of weapon is a Polearm.

Does he choose to fight? Absolutely not. He will do everything on his power to avoid violence, even if it means getting himself hurt in the process.

There have been times where he's shown his abilities but those instances are very rare.