If he has a fruit, it should be a Zoan because that's his crew's theme. I don't think his quirks (drunkard and being unable to die) have to weigh into the fruit, for most characters, that's not the case. You might say that being unable to die comes from a fruit, but seeing Big Mom being virtually invulnerable unrelated to her fruit, that doesn't have to be the case either.
I wouldn't be surprised if Kaidou's top henchmen (and he himself) all had special Zoans, i.e. Ancient or Mythical ones, since that's already the case for Jack and Drake. So he could be in that department too. But we don't know much else and the rest of his appearance doesn't give many hints (he's oversized, but so are most top-tier characters, and has horns, but that's pretty common). That leaves his nickname "All the Beasts", which might refer to his crew or some event in the past, but might still be related to his ability (which isn't that unlikely anymore, although still not a strong hint). My guess would then be some sort of Chimera or animal hybrid.
(Please be a Yeti)
No i agree 100% his impossible luck wont come from his df.....just like green bull not eating wont come from his..... but i think we can all agree kiadou has to have an animal themed df.
So that either means zoan or some weird paramicum.
My main point was the tardigrade df wouldnt offer him insane physical abilities.
My few choices for his df are-
1st Animal soul paramicum- ok so this is a really lame df, it is essientally the power of....idk urgue from lol? You know ehat i am talking about it is a common power in fiction, the ability to summon the souls of animals to gain their powers. Very over used, but it would fit his df perfectly.
2nd stick with me, 10 zoan all embedded into 10 rings, or pieces of armor. Imagine this, his dd like cloak has an eagle zoan so he can fly, his boots have cheeta/gazelle zoan so he can run with the speed of a cheeta and the stamina of a gazelle, he has a fake tooth in his mouth with a snake zoan (not the 2 the boa sisters have) so he can bite with poison. Then the ultimate move would be taking off all his cloths........ maybe this ability should be saved for a woman... well like i was saying he could remove all his animal enhanced cloths and they would all be independent animals that serve him making any fight 11v1 or 11veveryone in the war. It would be like that guy from naruto with the 5 hearts that were all monsters.
Finally, the low hanging fruit, lion zoan. The lion is the king of all beasts, it has been saved for a reason. It might seem lame at first but he could have some quasi mystical zoan like ability to command all beasts since the lion is king. Chopper and the minks can even turn aginst the crew and need to be restrained.....i mean..... they are a crew of animals attacking "kiadou the beast" kiadou has to turn them some how using his df, i couldnt accept a wano arc where that doesnt happen. 2ndly could you imagine how awesome it would be to see catstriker clash with kiadou.
Catstriker "hahaha we got him"
*stabbed in the chest, smoke clears
Kiadou in lion hybrid form "just who did you get, little kitty cat?"