Tari was an innocent, insecure girl frequently prone to hyperactivity who was a fan of video games, rubber ducks, and cats. She used to be a pacifist, and often tried resolving problems with words rather than actions. Now, unfortunately, due to what Aperture has done to her, she is now the opposite of how she used to be, calm, composed, confrontational, quick to anger and violence, and using actions instead of words. She was held captive in Aperture Science, tested, modified, and broken down.