Diablo immediately removes their slave collars and refuses to exploit them. His stated reason (“A Demon Lord does not need underlings”) masks a genuine ethical refusal. The series thereby critiques the common isekai trope of magical slavery (e.g., Shield Hero ’s Raphtalia) by placing the overpowered figure in the dominant position—and showing that true dominance is not exercising that power.
The premise begins with two young adventurers, Shera L. Greenwood (an elf) and Rem Galleu (a pantherian), summoning Diablo to enslave him via magical collars. The spell backfires, binding them to him as his “slaves.” This inversion is critical. how not to summon a demon lord
Beyond the Circle: Deconstructing Power Fantasy and Social Alienation in How Not to Summon a Demon Lord Diablo immediately removes their slave collars and refuses