if the lads cast were benders:
xavier: the avatar. 100%. no one else in the cast is as avatar worthy as the literal destined son of philos. woke up from his little spaceship and was like ??? no one else can do this??
zayne: water bender that only really heals, but is talented enough to bend ice and specialise in it (hes a healer though. doesnt like fighting). water kingdom healer
raf: fire bender. ironic considering hes the prince of the water kingdom, but he uses fire like water. his burns so bright its blue! also maybe bc making his blue flames tricks people into thinking hes a water bender
sylus: energybending. as a little baby abomination he crawled tooth and nail to find anything to make him as powerful as possible and came across the lion turtles (bc hes old as shit). pretends to be a firebender and rules his own little kingdom
caleb: airbending. lowkey wanted to make him an earthbender BUT i realised he could just be an EXTREMELY heavy handed airbender since gravity + his need for freedom. works for the fire kingdom bc ofc