Junpei Iori is one of the members of SEES, and one of the playable characters, in Shin Megami Tensei: Persona 3. He is known to be goofy at times, but also serious, and shows that he is slightly jealous of the main protagonist sometimes. Junpei is also shown to have a perverted mind, as evident by his interaction with various females in the game.
It isn't until he meets with Chidori that his personality changes somewhat, as he seems to show a caring side unlike before. Outside of Persona 3 and its ports, he becomes a playable character in Persona 4 Arena Ultimax, where he has become a baseball coach and a part-time member of the Shadow Operatives.