A
We saw Kaido (clear in the anime) uses the Riyu around his body and coat his club with it , that haki turn into thunder or lightning.
when you think about it we already saw many similar things
Luffy can use fire in red hawk , i think Luffy can somewhat can concentrate haki (Riyu) around his fist though it is not intentional but an effect of the concentration and he uses lightning in snake shot and Thor Elephant Gun.
Sanji diable Jambe
Zoro and Mihawk's slashes cause wind
Sabo dragon breath wind
Kinemon and his fire style is nothing the Riyu concentration around his swords
Dragon wind and lightning
I think will be able to use wind as well , Zoro will be able to use fire since he always wanted a fire sword but i think it is more effect of Riyu and not of the swords.
So Dragon is most likely not a df user.
Vista , Ashura Doji and Fujitora have flower style , i don't know where the flowers comes , maybe it is again Riyu as well
when you think about it we already saw many similar things
Luffy can use fire in red hawk , i think Luffy can somewhat can concentrate haki (Riyu) around his fist though it is not intentional but an effect of the concentration and he uses lightning in snake shot and Thor Elephant Gun.
Sanji diable Jambe
Zoro and Mihawk's slashes cause wind
Sabo dragon breath wind
Kinemon and his fire style is nothing the Riyu concentration around his swords
Dragon wind and lightning
I think will be able to use wind as well , Zoro will be able to use fire since he always wanted a fire sword but i think it is more effect of Riyu and not of the swords.
So Dragon is most likely not a df user.
Vista , Ashura Doji and Fujitora have flower style , i don't know where the flowers comes , maybe it is again Riyu as well