text: Shay Shay is Tally's on and off best friend throughout the series. They meet when Tally returns from visiting her friend Peris in New Pretty Town. Shay believes Tally can keep the secret about The Smoke. Dr. Cable forces Tally to follow Shay to the Smoke by threatening to withhold her operation. Shay becomes a pretty, and Tally follows, and once again when she becomes a Cutter for Dr. Cable. Shay also becomes cured of her specialness near the end of the third book and remains in Diego. Shay and Tally are often in disagreement about David and Zane. Even though Shay can sometimes seem deeply flawed, she is still one of Tally's true friends.
  David
  David is Tally and Shay's contact from "The Smoke". Shay met David when her friends were running away from the city, because David led them to "The Smoke" and showed them they could live out in the wild. David is the son of Maddy and Az; he was born and raised in the wild, after his parents left Tally's city. He is also in love with Tally, due to her seriousness while she was in the Smoke. But before she arrived, David was dating Shay, which causes tension between Tally and Shay throughout the first two books. In the end of Specials, he accompanies Tally in creating the new "Special Circumstances" that is it set on keeping the Wild safe, and making sure people weren't pushing too far. David never surged to become a "pretty", and is the only main character who was left ugly. At the conclusion of Extras, Aya notices David and Tally's closeness, confirming that, at the series' end, David and Tally are a couple.