Janna was Kethry's disguise during the Rethwellan coup. While Tarma played the role of Arton, King Raschar's closest companion, Kethry played Arton's gold-digging girlfriend Janna. She was described as an "attractive young wench" with a "generous figure," brown hair and "laughing eyes." (Oathbreakers)
'Arton' had installed her in a room at the Pig and Potion Tavern in Petras, with Jadrek in an adjoining room. This gave the conspirators plenty of opportunities to meet without raising any suspicions.