who is gamora's sister in guardians of the galaxy
Nebula (comics) Karen Gillan portrays Nebula in the Marvel Cinematic Universe as one of the children raised by Thanos alongside her adopted sister Gamora. Over time, Nebula developed an obsessive need to best Gamora in combat. Every time she lost a sparring match, Thanos subjecting Nebula to torturous mutilation, replacing parts of her body with cybernetic enhancements for further improvement. This imbued Nebula with a deep hatred toward Thanos.