In a world where superpowers, or quirks, define heroes and villains, Melanie Monroe is an 18-year-old girl with the powerful yet burdensome quirk “Puppet Control.” This quirk forces her to obey any command she hears, the quirk itself giving her with almost limitless power to complete said command, but no control over her actions once her power is triggered. Isolated her entire life in a government facility, Melanie has been trained as a living weapon, known to dark organizations like the League of Villains and All for One. Despite her upbringing, she dreams of becoming a hero and longs for kindness and freedom in a world that only sees her as a tool.