[To say that Aqua is a little surprised by how far Riku is willing to go for secrecy would be a massive understatement, but while she doesn't hide her surprise she goes along with it. There's not a whole lot else she can do, without jeopardizing whatever secrecy they're supposed to be hanging on to.

It feels a little ridiculous too, but she certainly isn't going say that, as she takes the other pen and another sheet of paper before setting about writing her own answer. "If it's not about us, then why mention us at all?" A moment later, something else occurs to her and she adds a hasty postscript. "And does it really matter that much if Isa knows?"]