Yeah seems the best fit, I can't see it be anything else.in my opinion this is the most likely choice cause it would have to be a guy and theres only 2 male air benders, book 2 slave route had an oc thing that worked out fine...though part of why i probably liked it so much is cause i was able to make my character look just like me and on the route that let me put azule in her place, so i might have a bias. regardless an oc seems to be the only possible answer if its not tenzen
And it's the perfect opportunity to bring in OCs if they have it when all those airbenders start showing up.