Tamra is a knight of the Arling of Amaranthine.
Little is known of Ser Tamra, apart from the fact that she is a knight. She is known to be sly.
If in the opening scene of the Oaths of Fealty, the Warden-Commander picks the persuade option and passes the check (requires Expert Coercion), Ser Tamra will be persuaded and, if spoken to, inform the Commander that she intercepted letters which suggest a conspiracy to overthrow the Wardens' rule over Amaranthine. This will trigger the quest A Brewing Conspiracy.
The Commander will then have to talk with Varel about this (the ceremony cannot end without talking to Varel if A Brewing Conspiracy is started). If the conspirators have not been dealt with by the time the quest A Day In Court starts, Ser Tamra will be found dead in the streets, likely murdered by Ser Temmerly the Ox.If the conspirators are killed before A Day In Court or Ser Tamra didn't inform the Warden-Commander, she won't be seen again and can be presumed to still be alive.