Lilo was one of the main characters on Sesamstrasse, the German version of Sesame Street, during the first half-decade of the show (1978-1983). She was played by Liselotte Pulver (or "Lilo" Pulver for short), and even though the character's last name was never revealed, the show made it appear as if the actress was basically playing herself.
For the framing stories of the show, she was either paired with human characters Henning (1978-1979), Uwe (1979-1982), or Manfred (1982-1983). Only for special episodes, such as anniversaries, did she appear with the other human Sesamstrasse residents.
Because the street scenes were repeated in new episodes for several years after, and intermixed with newly produced material, it appeared as though she "lived" on the street well into the early 1990s.