The trio who faced Kaido as main actors, Luffy, Momo and Yamato, two of them already hear and speak with Zunisha, Yamato as one of the Momotaru group could be linked to Zunisha too. And it also make sense.
Her df was very important for Kaido,he didn't even want that Yamato would eat it. Means the df was a very unique thing which Kaido got. And she fits in the describt from the Gorosei, she has a unique df, she couldn't used it for years and only used it during the raid, which implied that one of the CP0 witness her power and report it.
It also make sense, the Gorosei got the news of that df only right now in the chapter, the CP0 already know Tama power 1-2hours ago yet the report about the df came now first? The time where the report came to the Gorosei fits to the time when Yamato used his df for the firsttime. She is also strong enough to have a awakened df,not like Tama.
If I think about it,Yamato make right now the most sense.