An amazing girl who underestimates herself too much and is much more than she makes herself out to be. Rianna is that one friend who is always looking out for others more than herself and is willing to help them no matter what. She's sweet, a total heart-stealer and is super funny. A Rianna may also typically scream about Smash and Reggie Fils-Aimé. She is a lovely and kind person who may forgive people too easily, but it's just something that shows her kindness. A Rianna is someone everyone needs.
"Do you see Rianna over there?"
"Yeah man, she's pretty amazing."