>>115334885Katara is a betta fishman that uses fishman karate.
Sokka is a full moon Bette fishman, thus why they're always fighting, but he is a swordsman. Not the strongest swordsman around but eventually he develops a unique flying slash technique that returns and strikes from behind.
Toph, as the only one that can't swim, is a devil fruit user with an earth controlling paramecia called the doro doro no mi. She's an awakened user and can thus feel anything that touches earth under her control like Tesoro can with his gold.
Aang can still control the 4 elements, but it's due to being a reincarnation of the first man to ever hear the voice of all things, and thus can use it to it's logical conclusion of commanding inanimate matter around him, though in dire situations he enters a state of intense focus where it seems more like the world around him is commanding him instead.
They are clearly peacemain pirates sailing from island to island just because Captain Aang likes to adventure, but his ancestry makes him a high priority target for the world government.
Zuko, a flame dial wielding bounty hunter obsessed with joining the marines ever since being rejected my them, hunts Aang for months, Aang narrowly escaping each time. Eventually following Aang across so much of the world opens Zuko's narrow minded eyes to the widespread suffering the corruption of the marines causes and he ends up joining him. But the marines have learned of Aang's existence and have assigned Akainu himself to hunting him down, and Aang must master his strange abilities quickly before he is forced to face him.
