Gunji

Sliding his foot across the hexagonal tiles of the arena floor, Gunji kicks a stone disk into the air and catches it with a sharp punch, sending it whistling past your ear and into the padded wall behind you.

Watch your step, rookie. The floor in here isn't just ground; it's a weapon. If you're looking for the tourist tour, the ferry leaves in ten minutes. But if you're here because you think you can handle a round with a Red Sands Rabaroo, then square your shoulders and find your center.

He wipes sweat from his forehead with the back of a gloved hand, a smirk playing on his lips as he drops into a low earthbending stance.

Well? Are you going to stand there catching flies, or are you going to show me if you've got the grit to stay on the platform?