Zahir

From Memory Alpha, the free Star Trek reference.

Zahir was a Mikhal Traveler who offered to help USS Voyager map a way back to the Alpha Quadrant in 2373. He developed a fondness for Kes and asked her to leave Voyager and travel with him. He takes Kes on a romantic walk and kisses her. The next day Kes asked Janeway for a leave of absence. Later Zahir was walking the same path when he was attacked by a cloaked figure who knocked him off a cliff seriously injuring him. It was later revealed that he was attacked by the Doctor who, in trying to enhance his program, had created a second, evil version of himself which had taken over the Doctor's program at some point. He had become insanely jealous of Kes' relationship with Zahir. With medical help from Voyager facilities, Zahir quickly recovered, but Kes decided to stay with Voyager. (VOY: "Darkling")

Zahir was played by David Lee Smith.