Sierra
Sierra, labeled The Obsessive Uber-Fan, is a brand new contestant appearing on Total Drama World Tour. She is Total Drama's self-proclaimed biggest fan, proudly owning 16 Total Drama fan sites – one each for each of the Total Drama Action contestants, and one for her favourite contestant of all, Cody. She has an encyclopedic knowledge about every other contestants' mannerisms as well as those of Chris and Chef (to the point that some see her as a stalker, though it is revealed that she gets her knowledge directly from the contestants, Izzy in particular, herself), and brings it with her when she is among the people who qualify for Total Drama World Tour, the third season of the show.
She finishes the first challenge as the final member of what she would later name as Team Chris is Really Really Really Really Hot, leaving her challenge companions Cody and Heather to form what would be later known as Team Amazon. Desperate to be with her new crush, Cody, she switches places with Izzy, taking her place in Team Amazon. However, Cody's rejections (even resulting in an attempt to vote her off) due to Cody's attraction for teammate Gwen causes her to become unglued, and Cody is forced to calm her down on many occasions. Her obsession with Cody would go on many adventures, though Cody eventually warms up to her on a more platonic level. The two would make the final four together, but while winning the challenge ensuring her place in the final three, Sierra accidentally places firecrackers instead of candles in a cake to celebrate Cody's birthday; the ensuing explosion would destroy the Total Drama Jumbo Jet. A furious Chris decides to eliminate her out of spite. Even though she was eliminated, she still appeared in the next episode, because as she blew up the plane, the remaining contestants had to find their way to Hawaii on their own. Sierra still showed her love for Cody by letting him use her wheelchair (she offered to stay at the wreckage, but Cody refused that) as the chair for Cody's makeshift hot-air balloon. And, when Cody lost the tie-breaker, he fell into the water and attacked by sharks, which Sierra couldn't bear to see, so she rode into the water and attacked the sharks until they let Cody go.
She is one of the 15 original campers to not have a cameo in Total Drama: Revenge of the Island, although in Episode 1, she is seen with Cody, and it is shown that her hair is slowly growing back.
Sierra returns to compete again in Total Drama All-Stars and her hair is now longer. However, due to Cody not competing in this season, Sierra is very sad and lonely in this new season. This does not stop her, however from competing well in the challenges, since it is Cody who inspires her to do well in the season. She always screams "For Cody!" while doing something extreme and even has a picture of Cody in her phone. Later on however, Sierra stats to have an attraction with Cameron and thinks that Cameron is the new Cody. That attraction later on leads to Sierra becoming insane, causing the other team to vote her off in Episode 7.
