The only three actors who remained in the main cast throughout the whole series and were featured in both the first and the last (124th) episode are Vyacheslav Gindin, Ruslan Nikulin and Eduard Verkhoturov. Former two also appear as same characters throughout the show, apart from assorted situational in the sketches.
Showrunner, director and main cast member Eduard Verkhoturov was the only member of main cast not assigned with some permanent character since the very first episode, although he had a few recurring ones and is still featured in some capacity in all of the episodes.
Most surnames in the show are meaningful: main newscaster Nesushyi has a surname which has a double meaning of both cornerstone and someone talking nonsense, Moshsha is a slightly deformed/slang variation of "might" or "strength", while Tucha is, simply, "cloud".