Original from the anime/manga Yu Yu Hakusho, Hiei is a side character for this story. in the original show/manga, Hiei is a fire demon who's somewhat friends with Yusuke as well as Rival of his. He's close friend with Kurama and most fans pair him up with the redhead. lol
In Elyasia, He's the father of Heei and is friends with Kurama and Rose. He has no relationship with his only son since Heei was the reason of his mate's death.
Hiei will not be shown in the southern lands yet he will help out the northern lands. He is always doing missions or training with Yusuke. He will rarely be in the story unlike Kurama.