Magical Girl Lyrical Nanoha A's (魔法少女リリカルなのは エース, Mahō Shōjo Ririkaru Nanoha Ēsu?) (A's pronounced as Ace) is a thirteen episode sequel to Magical Girl Lyrical Nanoha, a magical girl alternate universe spinoff of the Triangle Heart series of games and OAVs. A third series, Magical Girl Lyrical Nanoha StrikerS, was released in 2007.