A Nyrian who poses as a helpful scientist aboard Voyager and works with B'Elanna Torres on the mystery of the disappearing crew while concealing his people's plan.
Rislan is a Nyrian. He appears in the third-season Voyager episode Displaced.
He arrives on Voyager during the series of exchanges in which Nyrians replace crew members one by one. Presenting himself as an astrophysicist, he offers to help Torres find the cause, steering the investigation away from the truth while more of his people come aboard.
When Torres comes close to the answer, Rislan drops the pretence and joins the others in taking the ship. The crew is held in an artificial habitat until Tuvok, Chakotay, Paris and Torres learn to use the Nyrian translocator and turn it on their captors.