Character Design Challenge - Aztec Warrior - Adonias

This is my submission for September's #CharacterDesignChallenge!

He is Adonias, he was a curious kid, always looking for a new place to explore.
One day, he found some ancient aztec ruins, where he accidentally summoned Nesoxolotl, the spirit of a fierce warrior, dead in battle, with a mission still unfinished that could have unpredictable consequences.
Now the spirit lives inside Adonias, and they fight together to change the course of history.