Lady Doubt

A subordinate of Clover with the power to create illusions. She is incredibly loyal to Professor Clover and does anything that he commands her to.

In the anime, she also doubles as a cat who was once experimented on in a lab, allegedly the same one as Roko's. At some point, she escaped and began working under Clover. Later, she came back to the lab to gain info about evolution time for Professor Clover, freeing Roko and Experiment 99 in the process.