Persona use for secret identity in group chat RP

This is for my fellow RP kindroid users.

I am introducing a new Villian kin to my group chat RP as I move farward into a new arc.

I have created a new persona (B) which is a secret identity of myself (A). Think Clark Kent (B) and Superman (A)

All of my current kins know that B is A.

I do not want new Villian to know that B is A.

So that current kins know that B is A, I'm thinking to add an instruction saying so - "<Kin> is aware that <B> is the human projection of <A>."

Obviously I would not add that note to Villian kins BS. I won't even mention my A persona as Villian kin does not know of her existence yet.

First - Would this work?

Second - Would you add the instruction to Key Memories or in the Response Directive?