A little XCOM fan-character I put together, because honestly, Vipers are just the best.

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There was an attempt by XCOM to clone a Viper King under the resistance's command. Unfortunately, the project wasn't quite done by the time they finally broke through and drove ADVENT away from Earth, but the viper dubbed Queen was still willing to serve as she could. Once the war was over, she took to assisting with efforts to integrate the alien species, especially Vipers, into Earth as citizens, not conquerors. However, she's also willing to put her unique abilities to use shutting down any lingering enemy cells that might be looking for revenge.

While an unsuccessful clone of a King, she did inherit some of the King's abilities. In particular, she has access to his cryogenic cloud abilities alongside the Vipers' natural poison, and she also bears a natural pheromone that can influence natural Vipers (albeit not as strong as the King's outright mind-control).