Vippa.

Iheta.

Sayk.

Zeng.

Long ago, the four nations lived together in harmony.... Ahem. The prompt was "Elemental", I couldn't resist!

In Silen Fah, all characters who are human (or part-human) end up developing special powers at some point in the story, and the four different styles of bending were included among these powers. Amanda is a waterbender, and can breathe underwater. Kyrck is an earthbender. Vellatra is a firebender (and so is her daughter Aileev!), and Vexina is an airbender. I had fun with this one since it was kinda-sorta a crossover with one of my favorite TV shows.