Marina Inoue
The opening theme in the first season is "Sekirei" and the ending theme is "Dear sweet heart"; both songs are performed by Saori Hayami (#88 Musubi), Marina Inoue (#9 Tsukiumi), Kana Hanazawa (#108 Kusano), Aya Endo (#2 Matsu). The ending theme used for episode 11 is by Saori Hayami. The opening and ending themes were released as part of the "Sekirei Original Soundtrack", released on July 23, 2008. The opening theme for "Pure Engagement" is while the ending theme is , both of them sung by Saori Hayami, Marina Inoue, Kana Hanazawa and Aya Endo, as it was in the first season. The ending theme for episode 10 is by Saori Hayami. The tracks are released in the "Hakuyoku no Seiyaku ~Pure Engagement~/Onnaji Kimochi" CD and the "Sekirei Sound Complete" CD.