Its a guess for now but i think it was just added to tie Yamato to Luffy, especially if she joins, which is looking pretty likely as of late.
Clearly there's a hidden past between her and Kaido, I wouldn't doubt there's something tragic between her, Kaido and her mother in classic Oda fashion. We gotta wait for that Rocks flashback
Clearly there's a hidden past between her and Kaido, I wouldn't doubt there's something tragic between her, Kaido and her mother in classic Oda fashion. We gotta wait for that Rocks flashback