She is a tribute of the 73rd Hunger Games. In the games, she was nearly eaten by a District 1 tribute named Crunch, but due to a malfunction in her Headquarters, caused by Sadness crying on the console, she got various "emoshun powers"; among them was a power to get supernaturally mad, allowing her to burst out of Crunch (giving her the nickname "THe Bursta") and kill everyone else in the Hunger Games and be declared victor. However, in the light of these events, President Snow ordered the execution of her parents, making her move to District 12, where she goes to Portal Middle School, where she meets Chell Junor Roberts.
In The AG 1991 Premiere of Inside Out, Skepness Man Beauregarde and Chell Junor Roberts staged a play, Inside Out, based on her own life. In the play, she is portrayed by their daughter, Violet Beauregarde, Jr., while her emotions are portrayed by Skepness Man (Fear), Chell Junor (Joy), Aranna Sorket (Sadness), Cranky Vasquez (Anger) and Joey Claire (Disgust).
Inside Universe is a story by ASBusinessMagnet that focuses on Riley's mind. In it, her lead emotion Joy uses her Imagination Land to imagine a "hugefier" that allows anything pointed at it to be enlarged, and uses it on herself and her coworkers. This means that the team cannot fit in Riley's mind anymore, and they end up exploding her head, killing her. The death is quickly shrugged off by Disgust, who says "LOL that was a dumb falmer troll anyways".
Riley is considered to be special as her mind is a separate place. In it, five emotions - namely Joy, Sadness, Anger, Fear and Disgust - control her actions. However, due to a mishap at where the emotions work, Riley gains "emoshun powers", being able to hear her emotions and be powered by them, similar to speshul powers exhibited by Marrissa Roberts and other MarissaTheWriter characters, but at the same time distinct from them.
- Inside Universe (Non-canonical appearance)
- The AG 1991 Premiere of Inside Out (Mentioned/Portrayed only)
- ITS MY LIFE!: THE FLAMES AWAKENS (First appearance)