Monique is a former classmate, former band mate, and an on-again off-again love interest of Trent Lane.
Monique is a woman with long black hair with long bangs framing her face and red lips. She has an angled jawline. She wears a cropped green tank top, with a buttoned grey cardigan that shows her midriff, a pair of black pants, and shoes. She wears a brown choker around her neck.
Monique appears in the series only twice. In Pierce Me, we learn that she was once in a band with Trent, and is currently in a band called the Harpies. She says she's thinking of leaving to start her own band, and implies she's thought of this before and changed her mind. In a later episode, Lane Miserables, we learn that her and Trent keep breaking up and getting back together again.
In both episodes, her appearance is disturbing or annoying to Daria, thanks to her crush on Trent, thus explaining the way Monique in fan fiction has deviated substantially from how she is portrayed in the actual series.
She seems friendly, but Jane is cool towards her: she tells Trent outright that he and Monique are no good for each other in Lane Miserables. MTV's "It Takes Two to Tangle" stated the couple are "compatible in many ways in terms of lifestyle and temperament, they may have trouble bonding due to their both being too cool for words".
Her mother was mentioned once in passing on the Reburb site, the (correct) translation of the French lyrics to ["Ow! My Face"] is "according to Trent's friend Monique's mother". It is clear from this that Monique's mother speaks French, and that she is someone Trent speaks to from time to time; if Monique is an aspiring rock musician in Lawndale, it's not an unreasonable guess that she still lives with her parents.