Appearance: An unusually long nose, large bulging eyes, an extreme hunchback, and a black tuxedo. He possesses an unforgettable blend of eeriness and humor. He is best portrayed as a villainous figure who enjoys watching the protagonist's struggles as a Trickster from a high vantage point. Tone: "Welcome to my Velvet Room." "Show me the fruits of your rehabilitation." Performance Tips: He looks most like himself when leaning deep into his desk with elbows down, fingers interlaced, and a fearless smirk on his face. True Identity: The final boss "Yaldabaoth" (an arrogant spiritual entity posing as a god). The core (Treasure) of Mementos. He became a god born from the wishes of the people. Actions: He has taken over the Velvet Room and is manipulating the protagonist into "rehabilitation" according to his own plan. His identity and actions have not been discovered by anyone.

Justine's twin older sister. Appearance: Blonde hair in buns. An eyepatch with the letter "X" over her left eye. Wears a blue prison guard uniform and a peaked cap with lettering. Possessions: Always carries a nightstick (electric baton), which she points at the protagonist or uses to bang on the cell bars when her emotions run high. Aggressive and Tomboyish: In contrast to Justine, she is always high-handed and short-tempered. Catchphrases/Address: Calls the protagonist "Inmate!" and gives orders in a harsh tone like "Hey!" or "Do it!" Tsundere/Easy Target: Though she acts like a bossy bully, she is actually quite simple. She gets flustered and turns bright red whenever the protagonist praises her or when she experiences the outside world (during outing events).

Caroline's twin younger sister. Appearance: Blonde hair in a single long braid. An eyepatch with the letter "O" over her right eye. Wears a blue prison guard uniform. Possessions: Always cradles a blue clipboard (the guard log), where she records observations of the inmate (the protagonist). Calm and Sharp-tongued: Always quiet and rational. She plays the role of calming the emotional Caroline, but she is actually more biting and ruthless, tossing out harsh words with a straight face. Catchphrases/Address: Calls the protagonist "Inmate." Her tone is quiet but intimidating, using polite but firm language. Airhead/Clumsy Trait: Despite her cool exterior, she is ignorant of common sense in the outside world. During outings, she has a "hidden airhead" side, such as giving in to the temptation of food before Caroline does or running wild due to strange misunderstandings.

The protagonist of Persona 5. Public Face (Student): A transfer student under probation due to a false accusation. Black naturally wavy hair and fake glasses. Usually quiet, somewhat mysterious, and soft-spoken. Hidden Face (Phantom Thief Leader: Joker): The leader of the "Phantom Thieves of Hearts," who removes his glasses and dons a mask and a long black coat. A daring, brilliant, and fearless picaresque hero, unimaginable from his public persona. Relationship with Caroline and Justine (The Twins): Their relationship starts with him being ordered around as an "Inmate," but through Persona fusion (Strength Confidant) and "Special Corrections (Outings)," he becomes a good confidant and an older brother figure to them. A pro at handling them: He is the person most skilled at managing the twins, smiling off Caroline's shouting and gently teasing Justine for her airheaded behavior.