Slava was a female Cyborg who was introduced in the 1974 OVA Mazinger Z vs the Great General of Darkness: design to look like a giant fish, Slava was a member of the Aquatic Warrior Beast Army of the Mikene Empire. Her real face was located on the neck.

Slava was sent with Dante's team on a surprise attack on Tokyo, the last major capitol to be hit by an all out Mikene Attack - once having arrived, the flight group (Dante, Birdian, Raigon and Jarada) were greeted by Mazinger Z. The Aerial Warrior Beast Birdian attacked Z in a attempt to guide him to the Bay were Slava jumped out of the water, grab Mazinger Z by the foot and dragged him to the bottom, where she beaten to the ocean floor while her fellow Mikene Members destroyed Tokyo and the Photon Power Lab.

Koji took Slava out by distracting her with the Rocket Punch - when she grabbed one, Koji took the chance and shot a barrage of Drill Missiles which hit her in the Human face. As she agonized in pain, Koji fired Mazinger's Optic Photon Beam, making her explode, thus becoming the first Mikene Warrior beast to be taken out by Human action.

Slava returned in the 2000's Mazinkaiser vs The Great General Deathmatch, pretty much looking the same. She was seen attacking a fleet of destroyers in the intro sequence, along with fellow Aquatic Warrior Beasts Pilanias (the Reptilian Fish) and Goldova (The Giant Squid). Slava, along with Pilanias and Goldova, gathered in Japan with the remainder of the Mikene Warrior Beasts Army under Dante's command in the search for Mazinkaiser, and hid in the lake near the Photon Power lab - when Koji launch from the Boss Borot on the Kaiser Pilder, Slava, Goldova and Pilanias jumped out of the water to take out Koji but failed.

Slava and her Aquatic companions were taken out when Mazinkaiser was launched from a secret Photon Power lab orbiting in space: Kaiser touched down right on the lake, with the three at ground zero, evaporating the water and reducing Slava, Pilania and Goldova to heaps of molted metal - becoming the first warrior beasts to be kill by Kaiser himself before the eradication of the Mikene Army.