In the Love Hina Again OVA, Matsuoka voices Kuro, a talking cat which is owned by Kanako Urashima (Kuwatani).
In the Negima series, Matsuoka voices Evangeline McDowell, while Kuwatani voices Yue Ayase.
In Getbackers, Matsuoka voices Madoka Otawa, while Kuwatani voices Himiko Kudo.
In The Melancholy of Haruhi Suzumiya, Matsuoka voices Tsuruya, while Kuwatani voices Ryōko Asakura. However, the two characters never interact, especially since, chronologically, Asakura leaves the story shortly before Tsuruya is even introduced. However, they do interact at one point in the omake anime web series Nyorōn Churuya-san.
In Magical Girl Lyrical Nanoha, Matsuoka voices Amy Limette, while Kuwatari voices Arf.