Is Imu the creator of the devil fruits?

- I’m not a consistent One Piece viewer!! -

So I don’t know if this was already been said. But I like the show and from time to time I see what’s the latest thing going on with the story and I recently saw Imu’s design reveal.

He is literally the devil, horns, tail, wings. Like, quite literally the devil. Is he the one who created devil fruits?