■Age: 17
■Date of Birth: January 16th
■Zodiac: Capricorn
■Height: 170.5 cm (5'7.5")
■Blood Type: B
■Initial Persona: Hermes
■Ultimate Persona: Trismegistus
■Weapons: Two-Handed Sword
■Arcana/Social Link: Magician
Junpei Iori is one of the protagonist's friends. Junpei feels insecure and often hides this with humor and boasting. His insecurities lead him to jealousy toward the protagonist. Junpei fights with a two-handed sword, but wields it more like a bat due to his lack of combat training. Like most of the playable characters, Junpei is a student at Gekkoukan High School, and has been in Yukari's class before.
Akihiko Sanada found him during the Dark Hour crying and disoriented in a convenience store. As soon as Junpei discovers he has the ability to summon a Persona, he joins S.E.E.S. and moves into the dorm, an action which irritates Yukari Takeba. Junpei is glad to join the team, as it gets him away from his alcoholic father, whom he resents.
Junpei fancies himself a ladies man, and has a somewhat dirty mind. He makes quick and inaccurate assumptions about the protagonist and Yukari's relationship, when she mentions 'last night'. Junpei is usually the first to comment on how attractive the ladies of S.E.E.S. are. On vacations, he attempts to pick up the local women, usually dragging his male friends along.
Junpei is eager to fight, because playing hero makes him feel important. He commonly neglects his school work and uses S.E.E.S. to boost his low-self esteem. Junpei grows jealous of the protagonist, due to his Wild Card ability and position as the field leader of S.E.E.S. Junpei acts reckless, often attempting to prove himself to his teammates. Junpei ends up falling for Chidori Yoshino, a member of Strega. Chidori's loyalty to Takaya Sakaki and Junpei's position with S.E.E.S. ends up conflicting, resulting in Junpei being fatally shot by Takaya. Chidori sacrifices herself and uses her Persona to restore Junpei to life. He becomes more focused due to her death, and his Persona becomes Trismegistus. Chidori's residual power remains with Junpei, allowing him to regenerate health over time.