Lilia is the heroine of the first game. She's the holy sword maiden and Cedric's beloved.

Spoiler

She was also reincarnated, and played the game in her past life. However, unlike Aileen, Lilia believes that since this is a game world, the people around her are all fictional characters with no real feelings or autonomy. This mindset leads her to act exceptionally cruel and manipulative. She doesn't even care if people die, since she doesn't believe they're real people.