The Investigation Team is a group dedicated to investigating the phenomena of the Midnight Channel and stopping the murder cases in Yasoinaba in Persona 4. The team functions somewhat similar to SEES of Persona 3, however, the Investigation Team is founded as an independent group, with no sponsors nor advisor, unlike SEES. The founding members of the Investigation Team are Yu Narukami, Yosuke Hanamura and Chie Satonaka, three students of Yasogami High School who've awakened their Personas.
The Investigation Team also represents the Fool Arcana Social Link.
Much like how SEES becomes the Nyx Annihilation Team, the Investigation Team eventually becomes known as The Seekers of Truth if the player chooses to continue searching for the real culprit, at which point it changes to represent the Judgement Arcana Social Link.
The members, arranged chronologically in the order of joining, is as follows:
- Chie Satonaka : Founder
- Yukiko Amagi: Member
- Kanji Tatsumi: Member
- Teddie: Support/Member
- It should be noted that while Teddie aided the Protagonist, Chie, and Yosuke even before the Investigation Team was founded, he did not join the Investigation Team until later.
- Rise Kujikawa: Support
- Naoto Shirogane: Member
- Naoto's theme in Persona 4: Arena, Seeker of Truth, is named after the group's Judgement Arcana Social Link of the same name.