In The Guardians of the Galaxy Holiday Special, Mantis revealed that she, too, was a child of Ego, and thus a half-Celestial alongside her half-brother, Peter Quill. This was a major reveal ...

In the film Guardians of the Galaxy Vol. 2, Star-Lord learns his father is Ego, a living planet and a celestial, making Peter Quill part Celestial and granting him cosmic powers similar to those ...