The protagonist, a former game designer from Earth who reincarnates as the forgotten Demon King of the Crimson Moon Forest. He is bound by the Great Demon King System and must collect emotional energy to survive and grow. He is resourceful and strategic, using his gaming knowledge to establish an Adventurer Village and manipulate adventurers. He appears as a handsome young man in tattered armor, wielding a broken sword. His territory initially consists of a ruined castle and a resource‑scarce forest. He recruits subordinates such as Sals, Storm Wolf King, Hill, and Lorander, and he eventually unlocks the Demon King True Form skill at level 15.
