Lightbulb

Lightbulb, labeled The Bright Leader, is a female contestant in Inanimate Insanity and Inanimate Insanity II.

Personality
For more information, see here.

History
In Season 1, she made a minor appearance.

She was more of a major character in Season 5, appearing again in Comic 5. Along with Test Tube, she travels back in time to stop Spongy from jumping into the lava, killing everyone. They succeed in that and soon, travel to the present. When Test Tube realizes that BFB 15 would be released on December 14 (for it was December 13 at the time of production), they travel back to BFB 14 so Spongy could jump into the lava. Test Tube kicks him into the lava and both travel back to the present.