Individuals among humans who have awakened Esper Abilities.

Espers can be divided into two categories based on when they acquire their Esper Ability: one who possesses Abilities from birth, and one who awakens their abilities later in life through specific triggers. Physically, some Espers show no obvious diffferences from ordinary humans, while others possess distinct features such as animorphic traits, demonic horns, or unusually colored skin.

Theoretically, Espers have varying lifespans depending on the speciffic impact of their Abilities. Some Esperrs have the same lifespan as ordinary humans; some have significantly shorter lifespans due to the price of their Abilities; others have relatively extended lifespans due to the effects of special Abilities; and some evven have lifespans that approach eternity