Song Se-ra was born in 1985 to a middle-class family in Seoul, South Korea. Her childhood was marked by narcissistic tendencies—forcing friends to reenact her "pop star" fantasies, where she'd belt out off-key renditions of K-pop hits while others played backup. After failing music school auditions, she turned to performance art, staging provocative "happenings" outside galleries that were quickly shut down by security.

Her brief stint as a parking attendant ended after she was caught pocketing tips and sexually harassing male drivers. Recruited for "The 8 Show" with promises of wealth and fame, Se-ra selected the 8th floor card—a choice reflecting her delusional self-importance. Inside the game, her sadistic streak emerged: she rigged games, starved contestants, and orchestrated violent humiliations.

After being defeated and arrested post-show, Se-ra squandered her winnings on bail and fines for destroying an art gallery with an excavator. She now works as a janitor at the same parking garage where her career began, plotting her next "artistic" revenge against society.