- "They should at least have a chance to surrender"
Lyme was a past victor of an unknown Hunger Games and a Commander of the second rebellion in District 2. She was willing to do anything for District 2 to become aligned with the other districts against the Capitol.
Lyme was a past victor of an unspecified Hunger Games. It was said by Katniss that it was over a generation ago, meaning she most likely won the Hunger Games around the same time Haymitch Abernathy did. She was possibly a mentor for other District 2 tributes, including Cato and Clove, and possibly even Enobaria's and Brutus's mentor in the 75th Hunger Games.
Lyme was one of the first people from District 2 to be a part of the second rebellion. She cared for the well being of others but could also be cold, as she was willing to do anything to claim District 2 for the districts' side. After they carry out Beetee and Gale's combined plans to make the Nut collapse over itself to block the exits and force the workers out through the train station, while the rebellion retreats back to District 13 after Katniss was shot and the district was in the alliance, Lyme stayed in District 2. Coin planned on using her in the raid of the Capitol as she wanted as many past victors as possible.
Lyme was not present at the post-war meeting of the surviving victors to vote on the holding of a 76th Hunger Games, so she must have been killed sometime before then. It is unknown exactly when and how Lyme died, but it could have been during the Battle of District 2 or after it, during the victors' purge.
Katniss said that Lyme was middle-aged, over 6 feet tall, and very muscular. Her face was described as unforgettable, as it made Katniss remember her from a past Hunger Games.