Oscar Pines is clearly the frickin' Avatar... but he'd probably start as a humble earthbender.



I dunno, I'm inclined to think Ilia is a firebender myself, specializing in lightning (quick, deadly, bright, like her whip weapon).



And the Belladonna's as big, tough earthbenders, Ghira especially, but Kali maybe as well. That way it covers the whole family.