You made it here? Inconceivable - Ruby, Otomedius Excellent
Such a pity that this is the end of the road... - Cobalt, Otomedius Excellent
Ruby and Cobalt (ルビー&コバルト - Rubī& kobaruto) are Bunny Girl Androids created by the Gofer Sisters in Otomedius Excellent. The bunnygirl duo joined up with Dark Force and the Bacterians for their serious mission in Space-Time Dimension while you defeat those core before you enter her dangerous world. Ruby and Cobalt pilot the Metal Slave core.
Ruby is voiced by Asumi Kana and Cobalt is voiced by Noriko Shitaya.