Who is Peter Quill's father in comics?

In the comics, Peter Quill's dad is J'son of Spartax. J'son is a powerful and somewhat complex character with his own agenda and history within the comic universe.

Definitely. In the comic universe, Ego is indeed identified as Peter Quill's father. This relationship plays a significant role in the storylines.

Yes, Ego was Quill's father in the comics.

No, Peter Quill isn't a Celestial in the comics. He has a different origin and set of powers.

Yes, Ego is Peter Quill's dad in the comics.

No, Mantis is not Peter Quill's sister in the comics.

Yes, Peter Quill is indeed Ego's son in the comics.

Peter Quill doesn't have a sister named Mantis in the comics. Their paths and roles in the comic universe are distinct and not related in that way.

One interesting aspect in Peter Quill's father fanfiction could be exploring his father's origin. Maybe in some fanfictions, his father is from a more complex and mysterious planet than what was shown in the official story. This can add depth to the whole Guardians of the Galaxy lore.

Peter Quill ends up with Gamora in some comic storylines.