A human with certain types of supernatural powers, Most commonly one or more of the following:
1. Extra Scensory Perception (esp)
2. Power over the four elements (Fire, Earth, Water, Air)
3. Time Travel
4. Power to manipulate space and matter
Esper activities are controled by the "Agency", I'm not sure of what this agency is made of but they have the power to control nearly every aspect of the material world.
Esper powers are no controled by the espers will, certain conditions must be met (as to what im not sure but i will update eventually).

Got the covid-19 vaccine

A human being born capable of using telepathy and other paranormal mental abilities.
Alternative spelling: ESPer
ESP stands for "Extra Sensory Perception".

A being of passive psych power. Having been around for at least 12 millenia the consciousnous of previous life trickles into the new bearers aura.

Final fantasy 3/6(same game) esper's are the magical beings, with surprise, magic, after the war of the magi, they made their own world and hide in it, to avoid giving ou tthe story to anyone, ill stop the definition there

A person with supernatural, mind-based abilities such as telekinesis (the ability to affect your surroundings solely by using your mind) or telepathy (the ability to communicate with another person through an invisible link between your minds).

One who has had their memory replaced with the gift of Aura in Phantom Dust