Overlord Jr.

4 vs. Satan:
*NONE
Alex in Princess Quest:
*NONE
The Stone of Power:
*All games: Rawn is Artimus' son.
The Three Kingdoms
*NONE
Dragondawn
*NONE
Harter Knall
*NONE
Hero Story
*NONE
Kill the Demons
*NONE
Satan Saga
*NONE
Story of Hero:
*NONE
The Legend of Devils
*NONE
The Sidestory Duology:
*NONE
The Time Of Bloody Fear:
*Demon Prince Dhan. Though it's unknown if it's just a title or if he's actually the son of Moses or a Demon King.