My Roommate Is a Gumiho — Characters & Cast

Initially to become human before his 1,000-year deadline expires; evolves into an overriding desire to protect Dam’s life and future, even at the cost of his own existence.

Begins as an aloof, refined, 999-year-old gumiho who views humans with polite detachment and sees the bead as a functional goal. Through his cohabitation with Lee Dam, his emotional defenses crumble, leading him from self-centered survival to ultimate self-sacrifice and mortal rebirth.

Initially to survive the bead removal process and graduate safely; evolves into choosing Woo-yeo as her partner despite supernatural obstacles.

A 22-year-old college history student with zero dating experience who prioritizes food, personal boundaries, and peace of mind. Upon swallowing the bead, she confronts existential danger with pragmatic boldness, learning how to love deeply without compromising her moral integrity or self-worth.

To live a luxurious, carefree human life and prove her superiority over Woo-yeo; evolves into seeking authentic love and genuine collegiate friendships.

A former gumiho of 700+ years who successfully turned human four years prior. Despite projecting sophisticated glamour, she struggles with idiomatic language, modern culture, and real-world social nuances. Falling for Jae-jin teaches her that being human means embracing imperfection and emotional sincerity.

To find reciprocal, earnest romance and support Dam through every hardship.

Lee Dam's fiercely loyal best friend who frequently gets taken advantage of due to his overly sensitive, devoted nature in romance. Through his relationship with Hye-sun, he learns self-respect while offering her unwavering security and understanding.

To conquer his bruised ego; evolves into genuinely wishing for Dam's happiness, leading him to step aside gracefully.

The wealthy campus idol who initially pursues Dam over a bet, only to be bewildered by her total lack of interest in him. Confronting unrequited love and the supernatural interference of the red thread, he matures from a shallow narcissist into someone who respects Dam’s agency and choices.