Rosie

Rosie is one of the protagonists of the Fossil Fighters game, which was played by Jaiden in The Most Underrated Game Ever.

History
When jaiden was playing Fossil Fighters, at some point Rosie came to Jaiden and told her about a guy who stole her dino medals and forced Jaiden to defeat him for her. Ever since that point, Rosie followed Jaiden through the entire adventure as a friend, but instead of helping, Rosie would constantly cause trouble and get defeated easily.

At some point, Rosie even asked Jaiden if she hates her, which jaiden replied with a "Yes" making Rosie really angry.

Later on the story, Jaiden was given the mission to save the earth from a giant dinosaur, however, the teleport that leads to it could only teleport two people at the time. Rosie tried to make Jaiden choose her, but Jaiden chose Duna instead.

After Duna was killed during the mission, Jaiden regret bringing duna to the mission while saying she should have chosen rosie, showing once again her hatred for rosie.