In Mockingjay, the third book of The Hunger Games trilogy, Leeg 2 is a soldier of the rebellion from District 13. She is a member of Squad 451 along with her sister, Leeg 1. The sisters are so identical in appearance that they are referred to as Leeg 1 and Leeg 2 by the squad for clarity. It is never explicitly stated that they are twin sisters, but Katniss Everdeen later remarks that the only way she could tell the two apart was by noting that Leeg 1 had "weird yellow flecks" in her eyes.
Leeg 2 goes to the Capitol with the rest of the squad to fight in the final battles of the war to crush Snow's regime. Like the rest of her squad, Leeg 2 is angry and disappointed to learn that Squad 451 was never expected to participate in any real battles. Informed by Cressida that they are part of the "disinformation team" that is designed to misdirect the Capitol from discerning that the rebel soldiers true purpose is to clear the abandoned sections of the Capitol of the deadly pods so that the rebellion can advance as smoothly as possible.
As innocuous as Squad 451's tasks are, on the fourth day in the Capitol, Leeg 2 hits a pod that has been mislabeled. Instead of muttation gnats, the pod releases metal darts. Leeg 2 is struck in the head by a dart and is killed instantly.
The next evening she is replaced on the squad by Peeta Mellark.