Squeak

Squeak was the younger sister of Midge a human who had been transported to the Cheetah World and he was infected by the virus. This meant that he would become feral. He transported the doctors arch enemy the Master to earth. Thus the master was able to teleport to Planet earth. She was upset when Midge killed her cat and was crying about it when Ace and The the Doctor walked in. Ace then took her up to her nans flat which was up stairs. (DW: Survival)