Hyori give enma because she see wado same crafter
Zolo already kill the same dragon than ryuma kill have his moments vs kaido with enma scar him like oden and now fight the 2nd strongest like in all one piece arc confirme in sbs
Kuina's grandfather, Shimotsuki Kozaburo, who founded the Shimotsuki school in the east blue came over 50 years ago to the East blue, unless there was another breach at the border for baby Zoro it's not the most likely scenario as the timescales don't match up.
Just because he looks identical to Zoro doesn't mean much aside from the line has strong genetics/mysticism with the one eye connection, Ryuma looked even more like Zoro and he is even further distantly related to Zoro.
Imo the more likely scenario is that he is either Zoro's uncle (older brother of Kuina's dad) or great uncle (younger brother of Kuina's grandfather).
Ushimaru was accompanied with a fox, the Spanish word for Fox is Zorro, there are some hints.
In my opinion, sometimes the easiest answer is the best. No need to made things more complicated.
Hyugoro specifically said he's the spitting image of Zoro, if Zoro had another father Hyugoro might had know him as well.
In my opinion if Ushimaru isn't Zoros father, there's only one possibility, he's Zoros uncle the identical twin of Zoros father.
If Ushimaru had an identical twin
, Then this twin of the family of the twin could have leaved wano 50 years ago with the other Samurai who founded Shimotsuki village. In my opinion that is unnecessary complicated.
The more likely scenario is that Zoros mother or some one Ushimaru trusted fled from Wano 20 years ago, Zoro was 1 year old. That's pretty possible. If people left wano 50 years ago, why not 20 years ago ?
Ushimaru Shimotsuki, in my opinion there's only 2 possibilities considering his relationship to Zoro.
1. He's Zoros father (the most likely possibility)
2. He's Zoros uncle and the identical twin of Zoros father (least likely)
His face and his fighting style is pretty much 100 % identical to Zoro.
In addition to that Ushimaru might have a Koktu/Blackblade... that would explain why he was called Dai-Kengou: Great Swordsman in the original Japanese Manga, only him Mihawk and Ryuma were called Dai-Kengou throughout the Manga, both have Blackbaldes that made sense for Ushimaru also having the Third Blackblade so far in the Manga.
Furthermore the long faced Samurai could possibly be related to Kyoshiro, the look similar.
I think he means yamato is holding her own longer than Zoro did against Kaido. Plus like Luffy and Zoro she also has ACoC. Thats why she is slightly above Zoro for now. But that will change in the final phase of Wano when ZKK happens.