Quick answer — Mai Narumi voices Virginia Robertson in League of Nations Air Force Aviation Magic Band Luminous Witches, Ayaka Nanakura in Pseudo Harem, Ayaka Kusagakure in A Ninja and an Assassin Under One Roof and 1 more characters.
Mai Narumi voices Virginia Robertson (League of Nations Air Force Aviation Magic Band Luminous Witches), Ayaka Nanakura (Pseudo Harem), Ayaka Kusagakure (A Ninja and an Assassin Under One Roof), Yumi-chan (Kaya-chan Isn't Scary).
Virginia Robertson is voiced in Japanese by Mai Narumi.
