She is not a very big character for the series, only a few times Lena appears. Born from a government family she tries not to be part of it and takes the road to become a gamer. Noui is responsible for Lena's mishaps but that does not stop her from escaping him all the time. Its unclear if she wants to be a gamer or not, the glasses on her might make her change her career. Despite having glasses she can fight her own battles against opponents.
Her powers are unclear, and little information was given from the game.