All 4 Uses

entity
in
The Infinite Sea
(Auto-generated)

They bored into his, and in a knee-weakening instant, he knew the entity hiding inside Grace's body.†
p. 87.8 *

entity = person, organization, or anything with a separate existence
He noticed that she was much calmer afterward, and he realized it wasn't the future that frightened her; it was the past, the fact that she feared the entity inside her body was a figment of a young human girl's shattered mind.†
p. 89.6
By definition, the entities inside them are immortal.†
p. 194.6

entities = people, organizations, lifeforms, or things that exist separately
There are no entities downloaded into human bodies.†
p. 282.6

Definitions:

(1) (entity)
a person, organization, lifeform, or anything with a separate existence
(2) (meaning too rare to warrant focus)