Lena Missa was a young, Chagrian girl that was a Jedi trainee on Coruscant during the Clone Wars. She was close friends with Tallisbeth Enwandung-Esterhazy, also known as Scout. Sadly, Lena lost her Master to the Clone Wars and was left to continue her training with the other young apprentices at the Jedi Temple. Lena joined her friend Scout in participating in one of the Temple's Jedi Apprentice Tournaments, and the two managed to make it to the final round together. The preceding rounds had been one-on-one duels with the other contestants, but the final round was an impromptu free-for-all held during the evening meal.
The final round pit the remaining eight contestants against each other in the dining hall. At the beginning of the fight, Lena squared off against Bargu eliminating the young Jedi with relative ease. When Scout managed to eliminate their toughest competition, Sisseri Deo, the two paired up to take on their penultimate threat, Whie Malreaux. Lena and Scout hoped to surprise Whie just as he eliminated Hera Tuix, but he escaped just as the duo launched their attack.
Lena then turned her attention to Pirt Neer, demanding his surrender as Pirt demanded that of Enver Hoxha. Unfortunately, Whie pulled the same trick and the two then fought with lightsabers. During the battle, Whie managed to pin Lena's arm behind her and exert pressure on her thumb. With no way to escape, Lena was forced to submit and was eliminated from the tournament. Once eliminated, Lena rooted for her friend Scout who faced Whie Malreaux as the consummate underdog. Despite having the odds stacked against her, Scout managed to defeat Whie to win the entire tournament. When Hanna Ding, another participant and bully of Scout, criticized her tactics in the tournament, Lena stuck up for her good friend.