7. Margaret

Igor's Velvet Room assistant, Margaret is regarded as one of the strongest characters in the franchise's lore, serving as a formidable optional boss. She's also got a unique method for advancing her social link; rather than spending time together, you just need to fuse certain Persona with certain skills, letting you devote your limited hangout time to other characters.

Despite not actually being a party member (perhaps not even human), Margaret and protagonist Yu carry a flirtatious relationship, and she (alongside her sister Elizabeth) showcases her fighting prowess as a DLC character in Arena.