"Brother Hadley" was the older brother of Remy "Thirteen" Hadley and Amy Hadley, and the oldest child of John Hadley and Anne Hadley. Like his mother, he developed Huntington's disease. He was an unseen character. All that his known of Thirteen's brother is that he was somewhat older than her and, by the beginning of Season 7, he was suffering from the late stages of Huntington's. Thirteen mysteriously took leave in Now What? and led the rest of the team to believe she was trying an experimental treatment. It appears she instead left to take care of her brother.