tuvok
^^^
Incorrect. Tuvok never appeared in the original series.
The answer is Sulu, who was a regular character in the original series, and appeared on Voyager in the episode "Flashback."
Firestar.
There was no character named Andra in the original series.
The original series: McCoy Next Gen: Crusher DS9: Bashir Voyager: the emergency holographic program (Doctor)
No, Clarisse is not a character in "The Lost Hero" book which is part of the Heroes of Olympus series written by Rick Riordan. She is a character from the original Percy Jackson series.
No, the character of Clive Jones first appeared in the 2007 episode Smith and Jones. Neither the character nor the actor who plays him ever appeared in the classic series.
Not in the original series .
Dwight Shrute is a character on NBC's The Office, portrayed by Rain Wilson and based on Gareth Keenan from the original UK version of The Office. In Living The Dream, the 3rd to last episode of the series, Dwight Shrute appeared.
The fictional character Sarah Jane Smith appeared in the UK series Doctor Who. She was then the main character in the UK series The Sarah Jane Adventures.
Star Trek (aka The Original Series) 1966-1969ST: The Animated Series 1973-1974ST: The Next Generation 1987-1994ST: Deep Space Nine 1993-1999ST: Voyager 1995-2001Enterprise 2001-2005Discovery 2017-Current
Robert April never appeared in the Original Series, he appear in one episode of the Animated Series "The Counter-Clock Incident" and was voiced by James Doohan
Sosuke Sagara is a fictional character from the anime series Full Metal Panic!. His sexual orientation is not explicitly stated in the original series.
Leonard Nimoy, who played Spock in the original Enterprise series, appeared as an older Spock in the recent Enterprise movie.