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When the Odysseus was infested with nanites over the planet Lionus, one of their engineers, a recovered Borg, used Borg nanites to fight the "infection."
The result of the two types of nanites interacting with the unique data-carrying structures of the Intrepid class Odysseus was the ship itself gaining a form of sentience.
When a power surge erupted through the bridge science station, some of those nanites gained similar structuring to that of Lt. Commander Lara Dosnara, the ship's Chief Science Officer.
The resultant "android," shown on the right here, has taken the name "Circe" based on the Ulysses/Odysseus mythology.
Continue Reading: Circe