*First appearance: ''Cool Barbie II - Return of the Champion'' (non-credited, 2009) / ''Cool Barbie III - Prisoners Freed'' (credited, 2009)
*Last appearance: ''Cool Barbie XI - Infiltration'' (2016)
Sergeant Grey is an Action Man who is a member of Spectrum International Police, and Corporal Barbie's immediate commanding officer. Courageous and assertive, he is good friends with Corporal Barbie. He helps fight Bubbles in CB.III (after being seen helping to man a barricade against him in CB.II credited simply as "Soldier 1"), and in CB.IV aids Cool Barbie and the Chancellor in attempting to thwart Colin's uprising. He accompanies Corporal Barbie to the Moon in CB.V, and calls her to the scene of Queen Lucy's assassination in CB.VI. After four years off-screen, Sergeant Grey appears in the Colin minisode, where he leads a group of Spectrum agents tracking down Colin and his followers. He appears again in CB.XI, intending to take Corporal Barbie to a medical check-up after her body-swap experience but ending up having to help deal with an attack on the Land by Colin and the Scourge.