Lady Diablador is the Queen of the Dogs of War, and wife to Doberlord. She, like her king, is ruthless. She does not hesitate to do whatever to get what she wants, even if that means killing one of her own. She likes "souvenirs" of the planets they conquer.

She aided Doberlord in an attempt to conquer Third Earth and the Thundercats, and actively partook in the torture of Lion-O, but was defeated by the very race they enslaved-The Lizarians. They saw their king, and revolted, allowing the Thundercats to take control. She was killed by an electrified trident. The trident was meant for Lion-O, but Wilykit pushed her in the trident's trajectory at the last minute.