Selena

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Selena is one of the members of the council on Argo. she is aligned with Reign (Samantha Arias) serving as a hologram that instructed and aided reign in the Fortress of Sanctuary

The Fortress of Sanctuary Hologram was an artificial intelligence created by members of the Worldkiller Coven to serve as a repository for their knowledge of both science and dark magic. Engineered from the brainwaves of an unnamed witch, the Hologram held all Kryptonian history.