Jane, Quinn, and Helen are all voiced by the same actress, Wendy Hoopes.
Daria often describes her perceived cynicism as unabashed honesty. Appropriately, the name "Daria" is Greek and means "upholder of truth."
The character Daria was conceived as a dry-witted comic foil to counter Beavis and Butt-head's stupidity on Beavis et Butt-Head (1993).
Daria does not appear in the 2011 Beavis et Butt-Head (1993) revival. However, it is mentioned and acknowledged that she moved away.
Daria and Jane are the only characters to appear in every episode.