Rhiannon's mother died at her birth, and when she was around 11 her father died from drowning. Not much is not about her past, but it is known that she became an actor and a singer during her teenage years. She moved to Riverview when she aged into an young adult, and later starred as minor characters in TV shows. In her adulthood, her sister moved in with her because she needs a place to stay.
Rhi-Rhi doesn't seem to care, or is not aware of that her sister has had a divorce and two kids with the Alvi family. Kiki is trying to keep it a secret so she doesn't get kicked out from her new home. Rhiannon plans to do a reality show with Kiki featured in it called "The Rhi-Rhi and Kiki Show." Even though she's a snob, she is actually a very nice Sim.
Rhi-Rhi has the exact same facial features as her sister, except she does not have a beauty mark and her lips are differently shaped. She also seems to have dyed her hair very light blonde. She is more thin than Kiki and wears a fancy red and hot pink zebra striped dress with a red bottom area and has red high heels. She also wears a little bit of make-up. Her hair is naturally brown.