Biography
->泉こなた（平野 綾）、柊かがみ（加藤英美里）、柊つかさ（福原香織）、高良みゆき（遠藤 綾）
They are the voice actresses for 泉こなた (Izumi Konata), 柊つかさ (Hiiragi Tsukasa), 柊かがみ (Hiiragi Kagami) and 高良みゆき (Takara Miyuki), the main characters of らき☆すた (Lucky☆Star) anime. They sang the opening song for this anime, called 「もってけ！せーらーふく」(Motteke! SE-RA-fuku / Take it! Sailor Uniform) and 「かえして！ニーソックス」 (Kaeshite! NI- SOKKUSU / Give it back! Knee Socks) song that comes with the OP single.
Biography text from Last.fm, available under CC BY-SA.