+ If people with long legs or long arms can be considered a unique/special tribe, so technically, Oni can
- Oda said in SBS that there is a type of humans who just grow horns
Exactly I’m referring to that SBS btw, also if you want to make the argument using the horns then Ulti, Page one and Black Maria are also Oni following that logic; furthermore, it was never alluded to that Kaido was being discriminated on because of him being an Oni nor was he mentioned as being special throughout the arc unlike King for example.
The reason why Kaido knows about Joy Boy is through King and Yamato, the one who’s waiting for Joy Boy is King btw, Kaido just thought the concept was cool and him wanting to change the world is Kaido’s own conviction and it has nothing to do with Joy Boy, Kaido always wanted to create a world of violence even before he met King and heard about Joy Boy.
The reason why he chose Wano was already addressed as well and the reason for that is the weapon factory and it being closed off