Dylan Früh (character)

Dylan Früh was both an active member of the cast during the first two seasons, and the main antagonist in both universes during the events of season 3. It's hard to ascribe the characters that actually are Dylan Früh, but it's widely accepted that most nameless one-off characters played by Dylan are, in fact, Dylan Früh--such as Ambiguity (see sections below).

Nameless Appearances
It's fair to say that most of Dylan's roles in season 1 belong to this character, they include:

As Ambiguity
"He is Dylan Früh", that pretty much sums it up.