|Label||The Obsessive Uber-Fan|
|Episode (s) Eliminated||Suckers Punched|
|Friends||Cameron, Sam, Mike, Zoey|
|First Appearance||"Heroes Vs. Villains"|
|Voiced by||Annick Obonsawin|
Sierra is the fourteenth and final contestant introduced after Chris calls her "Total Drama's number one stalker", and makes a large splash upon entering the water, soaking the other contestants. On the beach, Sierra is made a member of the Heroic Hamsters along with Courtney, Lindsay, Zoey, Mike, Cameron, and Sam. As the contestants are walking towards the cliff diving challenge, Sam asks Sierra why she came back, to which she replies for Cody, claiming that they would have won last time if she had not blown up the plane. He also comments on her hair growing back, and she tells him that she didn't want Cody participating as it would be too dangerous for him. She then begins to cry in the confessional about Cody, missing him. During the challenge, Sierra accidenly crushes Courtney under her weight in the carriage after collecting her key, obtained by beating up the sharks in the water. After Alejandro wins the challenge for the Villainous Vultures with the correct key, the Hamsters have to go to the marshmallow ceremony. Lindsay is voted off, and flushed down the Flush of Shame for her terrible driving.
Sierra is seen obsessing over her mobile cell phone device which she claims in the confessional is her only connection to Cody while she is in the game. She snaps a picture of Courtney while she is sleeping, annoying her and shocking Zoey. During the challenge, Sierra is visibly shocked to see Sam, after he stumbles over to the Hamsters looking very pale from a bug sting. She ends up over doing the challenge, digging way deeper than the other contestant's in search of a statue piece, and has to yell up to Cameron just so he can hear her. Luckily, the Vultures end up unable to finish their statue because of Lightning, and the Hamsters win the challenge.
That night, Sierra is seen enjoying life at the winner's cabin, and casually tucks in her cellphone with a blanket and against a pillow in a very animilalistic fashion, as if it's Cody, before falling asleep, causing Courtney to be weirded out. The next morning, she, along with Zoey, Cameron and Mike, sneak some extra breakfast food for Sam, after he returns from Boney Island. After Chris explains the challenge, the Hamsters get a head start because of their previous win, and Sierra helps Zoey carry Sam. While they walk through the woods, Sierra and Cameron begin to bond, and Sierra begins to see Cameron as Cody, scaring him. The Villains manage to beat the Hamsters to the larger crate, forcing them to use the slingshots. They then ambush the Villains, but Sierra accidentally shoots herself in the face with a leech. The Hamsters win yet again thanks to Zoey, and at the marshmallow ceremony, Sierra begins to hallucinate Cameron as Cody while in the Peanut Gallery, prompting him to volunteer for Boney Island just to get away from her.
Sierra welcomes Duncan to the team after the previous night's team swap, and celebrates along with Zoey, Mike and Sam. After leaving to get her phone so she can snap a picture, she finds it broken apart much to her horror (a result of the actions of Mike's evil personality). Because of her sudden Cody withdrawl, she begins to hallucinate and see everyone with Cody's head. Dependent on her phone, she attempts to repair it with a clothes hangar and tape. During the challenge, she snaps a picture of Cameron after he returns from Boney Island, and mixes up his name with Cody. She fails the challenge however, when she pukes after finding a suprise in her pancakes. Because of Sam's smuggling, the Hamsters are disqualified after seemingly winning the challenge, and Sierra and Sam are in the bottom two because of their poor preformances, however Sam is voted out instead of Sierra, keeping her safe another day.
Eliminated from Total Drama: All Stars