Especially as he's called the "World's Strongest Creature"

I checked, he said the "child of Ogres" so yes, he does not consider himself human. Yamato is even called the "Oni/Ogre princess"

This the official translation (Viz) by the way

He even says that Ogres are not supposed to be friends with humans, confirming again that both him and Yamato are not humans and that Ogres are a different species.

Thanks for finding it. I looked but couldn't find it. I knew he said it

@Chargerx999 did you come up with personalities and backstories for White beard and Ace yet?

Maybe Big Mom has Onis in Totto Land then.

I think that Oni is most likely just a variant of human, like Ancient Giants compared to regular Giants.

So not really an entirely separate thing, but still different.

Idk why I phrased it like that before

Maybe. WB was WSM and Kaido was WSC. They both had their epithets at the same time while living so clearly there's something inherently different about them

Did they have the titles at the same time?

I don’t remember them ever referring to Kaido by that title before Whitebeard’s death.

Also that could just be because the WG seems to choose their titles and might’ve just done it because Kaido is the “King of the Beasts”