Judging from her nickname, appearance, and mindset (Lust), Lydia is a sex-addicted predator of sorts. She is bisexual, and plans to prey upon Elora, a young and attractive woman.
The Nympho is a pale and slender Caucasian woman with a sheer white top exposing her cleavage. She has flowing blonde hair, a tight black skirt, and black toeless high-heels. She is listed as 34 years old.
- The Nympho seems the follow the archetype of a slut, and her name is a reference to nymphomania, a crippling set of sexual addictions.
- CONTAINS MAJOR WELCOME TO THE GAME SPOILERS: The ending "Who Am I?" in Welcome To The Game reveals that The Nympho is the Player. The reason she is looking for the Red Room, a livestream of torture and murder, is for sexual pleasure. The ending also reveals that she and Charles are in a relationship, possibly as partners in crime and/or boyfriend and girlfriend.
- contains major Welcome to the Game II spoilers: In the ending of Welcome to the Game II, The Nympho is present alongside The Breather, Adam, and the Noir couple. This proves she's close associates with Noir, or possibly even a devout follower. Like The Breather, she doesn't do anything, simply watching the player from the shadows as they're talked down by Adam.