Hayley (not Haley, Halee, Haily, Hailee or whatever people come up with) is a friend of Stephen and Mallory. She was Mallory's college roommate at the University of Wisconsin-Stout after the two of them met on Starmen.net. They started talking online after learning that they both lived in Wisconsin, and became roommates when Mallory transferred to UW - Stout.
She first appears live on Day 388. She continues to appear regularly at PAX and whenever the group gets together. Hayley also participates in the GTA Online series as well as other Stephen & Friends videos. In October 2014, she began her own YouTube channel.
She currently lives in Alabama with Alex, Stephen's college roommate. The two started dating after they met in person for the first time at PAX Prime 2013, and Hayley moved from Minnesota to California in 2014 to live with him. A general Q&A about the two of them can be found here. They became engaged on July 24th, 2016.
Quote: "I'm always 69 at heart" -@thekubliest