An ex-girlfriend of Hernan O'Brien, whom A.J. meets again in the Psychiatric hospital while recovering from his suicide attempt. They hang out together and, when they begin to have intercourse in the woods in A.J.'s Nissan Xterra, the vehicle's catalytic converter sets fire to the dry leaves below it and A.J. and Rhiannon scramble out; the truck explodes soon afterward. A.J. later tells his parents that Rhiannon, now his girlfriend, doesn't want him to join the Army. A.J. is shown picking up Rhiannon from high school in his new BMW M3 after a day of work at his new job, on the production team for a film bankrolled by Little Carmine. Rhiannon is a junior at Montclair High School.https://en.wikipedia.org/wiki/List_of_characters_from_The_Sopranos_%E2%80%93_friends_and_family#Rhiannon_Flammer