Who was surgically altered on Star Trek Voyager to look like a Vidiian?

The character who was surgically altered on Star Trek Voyager to look like a Vidiian was Neelix. He underwent a series of cosmetic surgeries by the Vidiian doctor, The Doctor, to resemble a Vidiian, giving him the characteristic pale skin, black eyes, and gaunt features.

The reason for this alteration was to allow Neelix to travel with Voyager without being a target for the Vidiian's harvesting of organs. He was given a false identity as a "Vidiian" named "Tal Celes," a former member of a group called the "False Prophets," who believed themselves to be immune to Phage.