Commander Bumi gets 5 seconds of air time on the last episode of Book 1 of The Legend of Korra, and I think I'm in love.
Bumi is the brother of Tenzin and the only non-bender of Aang and Katara's children.
Drawn from scratch on paper, then colored in photoshop. Background clouds were taken from this stock image: [link]
Note that his outfit might be a little inaccurate, I only had 5 seconds of footage to go from after all.