Sergeant Sokkuri was a human with a Galatean brain. Her ship was shot at by a Galatean firing squad, but she was rescued by Captain Kaido. She accompanied Kaido to the battlefield and was found by the Eleventh Doctor and Amy Pond, with whom Sokkuri stayed until she was called away by Commander Hachiman.

She later shot Kaido and tried to absorb her brainwaves before she died so Sokkuri could halt the countdown that would destroy the Earth. Hachiman activated an emergency E-M Burst that killed Sokkuri so that the plan could continue. (COMIC: The Child of Time)