The main character of Persona 3 is a silent protagonist, named by the player at the start of the game.[14] He is a teenage boy, orphaned as a child, returning to the city he grew up in ten years prior to attend Gekkoukan High School.[2] After learning of his ability to summon a Persona, he joins SEES, which is composed of students at his school: Yukari Takeba, a popular, cheerful girl; Akihiko Sanada, a calm and collected senior who leads the school's boxing team; and Mitsuru Kirijo, the Student Council President and daughter of the head of the Kirijo Group, who provides backup during battle.[15] As the game progresses, SEES gains several new members: Junpei Iori, a class clown and the Protagonist's best friend;[15] Fuuka Yamagishi, a shy girl who replaces Mitsuru as a support character; Aigis, a female android designed by the Kirijo Group to fight Shadows;[16] Ken Amada, an elementary schooler whose mother was killed by a Persona-user;[17] Shinjiro Aragaki, a former member of SEES who quit due to past events;[18] and Koromaru, a dog capable of summoning a Persona.[19]