Investigation Team

The Investigation Team of Persona 4 is the main group that hunts down the person who had thrown people into the TV world. Their leader is Yu Narukami (the first member) who is also the protagonist.

History
WARNING: SPOILERS The Investigation Team was founded after Yu Narukami, Yosuke, Teddie, and Chie. After battling Yukiko's shadow and saving her, Yukiko then joined the investigation team. After Kanji Tatsumi went missing, the investigation team went to save Kanji. After Kanji got his Persona he then joined the investigation team.

Then soon Rise went missing, as the Investigation team went to save Rise they found their attacks useless against Rise's shadow. After Teddie heroicly saved the day, Teddie's shadow appeared. Without Teddie, Rise found herself taking Teddie's place with her persona helping the team as a guide analyzing shadows.

Once Teddie got his persona, Rise joined the Investigation Team. As they progressed Rise became a helpful addition to the team by being able to use her Persona to scan shadows.

They then found themselves growing closer and closer until their friendship was tight. Afterwards Naoto Shirogane went missing. In order to save him from the TV world the Investigation team went in to save him. But once they got to him they found out a shocking secret about him: he was not a he, he was a she.

After defeating Naoto's shadow, Naoto got a persona and joined the Investigation team as the team's detective.