Possible Clues:

• Like some seals
• Like harp seals
• Like elephant seals
• Like certain monitor lizards
• Do you mean it's the countess that's so unsound?
• Intrepid leader coming out like Vincent, late in life?
• No such a noblewoman - she'd be quite unsound
• The deaf mate of the peer, perhaps?
• Perhaps the countess can get nothing, by the sound of it
• Is the noble lady deaf?