Electrika Steel is a feminine android, appearing as a bonus character in Band Hero, with a see through body and many pulsating pink/blue/purple lights flashing on her body. She has headphones and her "face" (she doesn't really have one) looks like the EVA helmet from the 2007 video game Halo 3. She can be unlocked through the cheats menu.
The cheat code is: B→B→R→Y→R→Y→B→B