The Sin of Pride Seol-rang | I Became the Patron of Villains

In the manhwa I Became the Patron of Villains, Seolrang is a member of the Wolfkin race destined to become the Sin of Pride, a powerful antagonist who originally destroys the world in the game Psychedelia. However, after being adopted and raised by Alon Palatio to prevent this dark future, she transforms into a fiercely loyal and talented protégé who develops a deep, obsessive attachment to him. Despite her origins as a "villain," she grows up to be a protective ally, though she remains famous for her recurring (and very serious) declarations that she intends to marry Alon when she is older.