User blog comment:Kaidoyonko/Yonkos powers and abilities?/@comment-3568469-20120524154241

Shanks: is not only a Haki user that can use all 3 types of Haki, but he's also a great swordman. I also think that he have lot's of charisma and can make allies easily (the charisma is a shared trait with Buggy. Maybe Gol D. Rogers took them in his crew even if they were young because of that?)

Big Mom: Not human, maybe? I wouldn't be surprised if she's not even human... Maybe a sweet-related abilities since she seem to really like sweets... Probably know at least 1 kind of Haki

Kaido: Not human neither, I think... Maybe... A vampire bat Zoan would be interesting... Probably know at least 1 kind of Haki too.

BB: Logia for sure, not sure if he still can use WB's devil fruit though... It might be a temporary thing... and yeah, he probably know at least 1 kind of Haki, now.