[quote=@Ira]
[@Hillan] Marxo's only knows who they are because of what his teacher told him. Johnny kinda revealed himself in that fight with Xerxes as Marxo pretended to sleep. btw if you read the history marxo's teacher is an adimiral. They would be the only be people with this knowledge
[/quote]

I did read it, and I see no reason that all of the Admirals would know who the CP9 Assassins are. Aokiji gave Spandam to do a Buster Call, that's the only interaction we've seen with Admirals and CP9. The CP9 have the right to kill anyone who's a danger to the World Government, according to the WG, that could even include an Admiral. Don't think any of them would really be let to know. Fleet Admiral is probably the only one who'd know, and he'd keep that a secret.

I mean, regardless, Marxo didn't blow their cover, so in the end, it doesn't matter. You're the GM, after all.