Luann has bob-cut blue hair and red round glasses. She wears many different outfits. She sometimes wears white pearl earrings. She also had thick blue eyebrows.

Luann is of Italian and Greek descent. Her mother, Sophie, is Italian, although Luann never speaks Italian or is seen with her mother (who remains in Italy with Luann's half-brother, Bastardo).

Luann was born in Shelbyville, a town founded on the principle of freedom to marry one's cousins. Her birthday is December 1.