In their natural form, Gizou were thin humanoids with purple skin, lumpy heads, and four digits on each hand. Their skulls were smaller than a human's, with larger eyeholes and flattened teeth. Gizou could change their size and shape, allowing them to mimic other forms of life. This ability was linked to the proteus particles found in their body. They weren't entirely accurate, though, and made mistakes. (COMIC: Agent Provocateur)