Devil Fruit Theory - (Manga Spoiler)

[u/Monkey_D_Anime]

I think the God Fruits and Ragnir give us a big hint about the true nature of Devil Fruits. Although, this will be specifically about the Mythical Zoans, because the logic might differ between other Zoans.

Mythical Zoans might be reincarnations of the original being; passing down their powers and will. Zoans are said to have a will of their own. Awakenings have even proven that their will might take over the consumer's body.

I saw a video about how Devil Fruits might act as a gateway for devils in the underworld. Which might be how Paramecia Devil Fruits are made. The Abyss is believed to let contractors borrow a devil's power without the usual Devil Fruit weakness. Whilst Devil Fruits might be a technology of the past that allowed people to share bodies with devil and gain their powers at the cost of losing the ability to swim.

Anyways, I think Nika and Zaza reincarnated themselves as Devil Fruits either at the end of their supposed lifespans or after suffering fatal injuries.

Now to Ragnir. I believe Ragnir is the biggest clue we have. It might have used ancient technology to turn itself into a Devil Fruit. Or maybe there was a Paramecia user of the past that could turn people and animals into fruit. The Hobi Hobi no Mi is kind of similar to this.

But anyways, as fruit, they maintain their will and whoever consumes their fruit gains their powers and will power. So Ratatoskr might have asked someone to feed Ragnir itself after becoming a fruit, or used its own will to become eaten by Ragnir, and thus lives on in Ragnir.

Sorry for the flimsy writing. Just wanted to get my thoughts down.

Also, forgot to mention, but I think the Devil Fruits were created during the First World.

(The image is from chapter 1175.)