Leonidas is the son of a Rex Guardian. He has blonde hair and dark green eyes.
He is very affable and considers himself a ladies man but is reckless and cocky.
He uses owns an energy staff powered by a yellow energy crystal.
Trivia:
Leonidas's name means Lion.
His name also comes from the hero Leonidas from the movie, 300.
He is the third child of the Rex Guardians to be introduced.