Sayumi Michishige
As of January 2009, she and Risa Niigaki had the longest tenures of any member; she was one of only seven members to remain in the group for seven years or more (the others being Kaori Iida, Yoshizawa, Niigaki, Eri Kamei, Sayumi Michishige and Reina Tanaka) and one of two (along with Niigaki) to remain in the group for eight or nine years.