The term "Phantom Thieves" refers to a group of fictional characters from the video game series Persona, particularly Persona 5. In the game, they are a group of high school students who possess the ability to enter a supernatural realm called the Metaverse. Their mission is to steal the distorted desires of corrupt adults, aiming to reform society by exposing their wrongdoings. The Phantom Thieves operate under a code of justice, using stealth and strategy to achieve their goals. Each member has a unique persona, which represents their inner self and grants them special powers. The group is known for their iconic masks and stylish outfits, symbolizing their rebellious spirit against societal injustices.