Ok so here are the characters and their sexualities.
Zuko as Alexander Hamilton (bisexual)
Sokka as John Laurens. ( bisexual)
Mai as Eliza ( straight)
Suki as Angelica ( straight)
Katara as Peggy ( straight)
Haru as lafayette ( gay )
Toph As mulligan (lesbian)
Ozai as burr ( straight )
Iroh as Washington ( STRAIGHT
Long Feng as Thomas Jefferson( STRAIGHT)
Hakoda as James madison (STRAGHT)
THE EARTH KING AS KING GEORGE (GAY)
ZHAO AS JAMES RYOLDS (STRAIGHT
JIN AS MARIA RENOLDS (STRAIGHT)
REPUBLIC CITY IS THE REPLACEMENT FOR NEW YORK. THE UNITED REPUBLIC IS BASICALLY THE US AND IS FIGHT FO INDEPENDENCE AGAINST THE EARTH KINDOM.
SO YEA ENJOY