
Quick answer — Mari Shiraishi voices Venelana Gremory in High School DxD BorN, Kyouko Izumi in Magimoji Rurumo.
Mari Shiraishi voices Venelana Gremory (High School DxD BorN), Kyouko Izumi (Magimoji Rurumo).
Venelana Gremory is voiced in Japanese by Mari Shiraishi.