10 Star Trek Characters Who Appeared On Multiple Series
2. Quark
In their first appearances in The Next Generation, the Ferengi were depicted as being vicious trolls driven only by greed. As time went on, they became more comical, less vicious, and somehow even more greedy. Well, in most cases.
Quark was the owner of the bar and casino on Deep Space Nine. While he seemed to be a regular Ferengi, he frequently made decisions that were not typical of the species. The rest of his family was even less Ferengi-like. His mother was a businesswoman, which is strictly prohibited by Ferengi culture, his brother worked for the Bajorans as an engineer and his nephew was a member of Starfleet.
Beyond DS9, Quark went on to make appearances on both The Next Generation and Voyager. While he didn't appear on Picard, he was name checked in one episode and has apparently left the station behind. Quark also appeared on both Regis & Kathy Lee and The Tonight Show with Jay Leno.
It's also worth noting that Armin Shimerman, the actor who played Quark, also played two other Ferengi on The Next Generation before taking the regular role on Deep Space Nine.