Celestials (天人 tennin, , lit. "sky person", "heaven person", or "Deva") are a race of heaven-dwelling beings that ascended from a Human or Hermit. They are thought to be immortal, but only because they consistently defeat Shinigami that attack them, which increases their lifespan.
Celestials in the Len'en Project
It is implied that most Celestials live in the Heavens. Souko Shirami is one of those exceptions, they spend the majority of their time on the ground, and try to avoid conflict with Youkai and Shinigami alike with various magical tools and repellent charms. In the Len'en Project, one has to be born as a Celestial and cannot decide to become one by choice. In a conversation with Taira no Fumikado and their crew, Souko mentions how they have connections to a god, but it's unknown what god this is.
Characters that are this species