Dianan A (ダイアナンA - Daianan Ēsu), also known as Diana A is a giant female robot created by Doctor Yumi Gennosuke, Doctor Morimori, Doctor Sewachi and Doctor Nossori with inspiration from Doctor Kabuto Juzou's designs.
It is an improved and more combat capable version of Aphrodai A.
Like Aphrodite, Diana A is armed with the Oppai Missile System, but can also shoot laser rays from its optical units (eyes).