Crystal, Ronnette, and Chiffon, are the three narrators of Little Shop of Horrors. They appear in just about every song in the movie acting as a "greek Chorus". They are notable as the only characters who know what's going on from the beginning to end.
In this movie, they appeared, at least as harmonies, in just about every song, except perhaps "Mean Green Mother from Outerspace". It is questionable whether they are really there, meaning when characters can see them. the only time it is 100% confirmed they are there is when they appear as street urchins, warning Audrey that Orin Scrivello, D.D.S is wrong for her. During the song Suppertime, it appears that they are telling Seymour to get Mushnik to go inside of the Audrey II plant. This adds a bit more to their characters and their intentions.
Crystal is played by Tichina Arnold, Ronnette is played by Michelle Weeks and Chiffon is played by Tisha Campbell; all of whom lent their singing talents to the roles.
Original Script Character Description
The original script offers a character description of Crystal, Ronnette, and Chiffon as follows:
"Three black female street urchins who function as participants in the action and a Greek Chorus outside it. They're young, hip, smart, and the only people in the whole cast who really know what's going on. In their 'Greek Chorus' capacity, they occasionally sing to the audience directly. And when they do, it's often with a 'secret-smile' that says: 'we know something you don't know'"
Both Tichina Arnold and Tisha Campbell starred in the sitcom Everybody Hates Chris.