Eldast

 was a Silurian baby resident at Dorium Maldovar's nursery in the Medusa Cascade. Arguably the brains of the group of children at Moldovar's nursery, she often came up with plans to stop her foes. However, she wasn't very nice.

A Spoonhead version of her was made, which downloaded Chas and Chelsea. (COMIC: Alien Babies!)