Dementia

Dementia, labeled The 'Deadpan Snark' was a camper on Outlast: Island as a member of the Screaming Gophers.

Personality
Dementia doesn't care. That's usually what you'll notice about her, but when she does talk it's usually emotionless and snarky. Dementia is actually a nice girl. Just reeeeeeaaaaallllyyy shy. She often feels in the shadow of her sister Nightshade because of how outgoing and determined she is. So instead she usually just doesn't show emotion and hopes no one ever cares enough to actually invest time in her... like they would, right?

Not So Happy Campers Part 1
Dementia arrived on the island, not speaking to anyone, nor accepting a handshake which Hallie offered her upon her arrival. Dementia ignored Hallie and this caused Hallie to comment but Dementia was not affected. Mina tries to converse with her however the attempt is stopped.

Later, Molly is interrupted mid sentence when she reveals that Dementia will kill a spider, however she had already done so before Molly finished her sentence. However, it was accidental.

Upon being put on a team, her creepiness was commented on, only leading to a huff. Her first line is correcting MIna getting her name wrong.

Dementia is seen lining up by Nightshade and afterwards sitting down with her team, before being seen at the cliff top with all other contestants.

Not So Happy Campers Part 2
Dementia was one of the first to dive, she merely stepped off of the cliff and fell into the water. Unluckily, she did not land in the safe zone, but she beat up and rode a shark to shore. When seeing everyone cheer for her, she proclaimed that she didn't care and that "it was nothing".

Dementia, along with Edwin, Molly and Roberto, was given the job of distracting the other team. Dementia stops the complaining by interrupting them with her monotonic voice, but Nightshade talking silences her. When Nightshade chastises her, Dementia does not care.

Dementia later (after the ceremony) goes to the Bass girls' cabin to see if Nightshade is safe, when Nightshade reveals she is Dementia acknowledges it but does not smile and then turns away.