Aya Hirano
Four character song CDs were released on September 5, 2007 sung by the voice actresses Aya Hirano as Konata, Emiri Katō as Kagami, Kaori Fukuhara as Tsukasa, and Aya Endo as Miyuki. Four more character CDs followed on September 26, 2007 sung by the voice actresses Shizuka Hasegawa as Yutaka, Minori Chihara as Minami, Kaori Shimizu as Hiyori, and Nozomi Sasaki as Patricia. Another two character CDs followed on October 24, 2007: one as a duet between the voice actresses Kaoru Mizuhara as Misao Kusakabe, and Mai Aizawa as Ayano Minegishi, and the other as a trio between Aya Hirano, Shizuka Hasegawa, and Minori Chihara as Konata, Yutaka, and Minami respectively. Another two character CDs, both duets, followed on November 21, 2007: the first between Hirokazu Hiramatsu as Sōjirō Izumi, and Sumi Shimamoto as Kanata Izumi, and the other with Saori Nishihara as Yui Narumi, and Konomi Maeda as Nanako Kuroi. A thirteenth character CD, again sung by Kaoru Mizuhara as Misao Kusakabe, was released on March 26, 2008.