Appa. A flying, air-bending, sky bison with a strong liking for melons who is also a total badass, ninja thug at combat. Of course, he has helped save Team Avatar several times during the series. But why do we love him so very much?
He’s furry, friendly, and ferocious. Appa isn’t quite a literal ninja, but with his powerful, fan-like tail, he has air-bended enemies in a fashion that would probably leave most regular people with a healthy respect for large mammals as he swooped up the fire-bender-fighting good-loving Team Avatar and flew them away to safety. During that dark and terrible time of Appa’s kidnapping, the viewers get some beautiful back story on Aang and Appa’s friendship as Aang curls up to cry about the loss of his friend. If you didn’t cry with him, there is a good chance that you might be heartless,as I’m sure I nearly die of sadness every time I watch it. But during this time, we also get to see more of “angry Aang,” the one who is not a pacifist monk as he loses control of his avatar powers and causes some serious damage to both, people and property. This is exactly why you don’t fuck with someone’s sky bison. The grief of Appa’s loss rocks all true lovers of Avatar so that we all felt that loss deep in our empty, black souls. But naturally, Appa does not go down without a good fight, and that is one of the things we love about him. He likes beach parties but will also suit up to go to war beside you.
His funny fights with the little lemur, Momo.
Of course, the best one is only part of a re-occurring nightmare that Aang suffers from as the time creeps up on him to face the Fire Lord, but it does bear a strong resemblance to the basic personalities of both, Appa and Momo who already have a somewhat combative, though loving, relationship. But since they are both plant-eating animals, they also fight over food (which is often scarce during their long travels). It must be appreciated that their squabble over a melon also serves as an opportunity for Aang to practice his peace-making abilities, one of the jobs he has been tasked with in his unasked-for position as the Avatar.