Two Naval-based questions, one for Cowed and one for the Emissary.
With Cowed, does "be declared alone" mean it is the only character being declared at that moment in time, or that upon being declared it is the only attacker/defender (delete as applicable) in the challenge? My assumption would be the former, in which case this attachment would shut down the Naval Enhancement quite nicely, but I thought it was worth checking.
Rhoynar Emissary, on the other hand, I don't have a clue with. If you target a Naval character, would that character have to immediately be Naval'd in, as its controller's first player action? Would it have to be declared as a defender during declaration of defenders framework action? Does it not matter which, so long as it is in the challenge by the end of that framework window? Or does it not matter so long as it enters the challenge at some point? If the latter, when would it be discarded? Right before challenge resolution? Or would it be moribund through the resolution?
Thanks for any help that can be given!