A Romulan physician and former Borg drone living in a mixed colony in the Nekrit Expanse, who treats Chakotay by joining him to a small group mind.
Doctor Orum is a Romulan who was assimilated by the Borg and later freed when his cube was disabled. He appears in the third-season Voyager episode Unity.
Orum lives among a community of former drones led in part by Riley Frazier. When Chakotay is brought in with a serious head wound, Orum explains that their medical supplies cannot save him, but that a neural link with a few of the group can help his brain to heal. Chakotay reluctantly agrees.
Orum supports the plan to reactivate the dead cube's neural transceiver and impose a new collective on the squabbling colonists, which the group carries out by taking control of Chakotay.