Specialized Extracurricular Execution Squad

The Specialized Extracurricular Execution Squad is an extracurricular club at Gekkoukan High School. While the school sponsors them, they're true purpose is to eliminate the Shadows and investigate both Tartarus and the Dark Hour. Their sponsor is Shuji Ikutsuki and Mitsuru Kirijo functions as the club leader. The Protagonist (Persona 3) ends up leading the club in many instances due to his unique abilities. Other than Ikutsuki, all the members of S.E.E.S. are Persona users. Additionally, all the members are students at Gekkoukan, other than Ken Amada and Koromaru.

In Persona 3: FES, S.E.E.S. reforms in order to investigate the Abyss of Time after all of it's members become trapped in the dorm.

Members
The members, in the order the effectively joined, is as follows:
 * Shuji Iktsuki
 * Mitsuru Kirijo
 * Akihiko Sanada
 * Shinjiro Aragaki
 * Shinjiro, Akihiko, and Mitsuru are the initial members of S.E.E.S., Shinjiro quits S.E.E.S. following and accident, but rejoins at a later time.
 * Yukari Takeba
 * The Protagonist
 * Junpei Iori
 * Fuuka Yamagishi
 * Aegis
 * Ken Amada
 * Koromaru
 * Metis
 * Metis joins S.E.E.S. after it is initially disbanded. S.E.E.S. reforms in order to investigate the Abyss of Time, and she joins during this second formation.