Elmo plays a small but important role near the end of the saga. As of now he does not appear later on in the series but that may change eventually. He is a deceased fire mage that has legends told about him. He does not actually appear in person but in visions and speaking in Shogo's mind.

He plays a critical role in wrapping up the saga so although the role is fairly short I would like to have someone specifically cast for it. 

His soul still is trapped waiting to be reunited with his love, and has been waiting for generations to be reunited with her.

I don't have a specific voice in mind other than he should sound wise and desperate.