Cassia Dylan Reyes
The 17-year-old female protagonist of the novel. Cassia lives within the Society with her parents, Abran and Molly Reyes, and her younger brother, Bram. Upon her 17th birthday, she is Matched, as is every other citizen who isn't an aberration/related to one, or the citizens who choose to be single. She has been matched with Xander Thomas Carrow, a fun, intelligent boy whom she has known her entire life . But, when a glitch in the matching system appears,Cassia sees Ky's face instead of Xander. She wonders who she will choose, between perfection or passion.
Xander Thomas Carrow
Xander is Cassia's childhood best friend, and has been Matched with Cassia. In the beginning Cassia cannot believe her fortune: that she is matched with her best friend that she has known for 17 years and it is unusual for people who already know each other to be matched, and Xander is her borough's golden boy - a handsome, intelligent, kind and caring young man who follows all of the rules. Xander has always loved her for as long as he can remember. He is also acquainted with Ky Markham; they both belong to the same social circle with Cassia and a few others. As the novel progresses, more of Xander's underlying character is revealed, and he turns out to be much different than he seems to be on the surface and will reveal his true self in the next book in the series, "Crossed."
Ky is an Aberration, a person who has been revoked of Citizen status because of his father's acts against the Society. Ky was adopted by his paternal aunt Aida Markham, and her husband Patrick Markham as a replacement for their son who was murdered, something that almost never happens in the Society. Because of his status as an Aberration, Ky has dropped out of high school early and taken up a work assignment as a nutrition disposal worker. In addition, he will never be allowed put himself into the official Matching pool, and is thus not supposed to be Matched with anyone. Nonetheless, his face briefly appears on Cassia's microcard, which arises curiosity and results in an increased interest in him. Ky secretly harbors strong feelings for Cassia, even though she has been matched with Xander. They begin to spend more time together in their summer recreational activity - hiking. As Ky helps Cassia cover up some illicit activity, the two begin to fall in love.
A group of people in the high governmental levels in the Society are known as "Officials". One in particular plays a tremendous role inside the entire plot of the novel, and is considered one of the main antagonists of the story. Throughout the novel, it can be noted that she tries to subtly influence Cassia's actions. Eventually, the Official forces Ky Markham to move out of the Maplewood Borough, thanks to influencing Cassia in sorting Ky into the higher levels at the nutrition site he worked at. Afterwards, the Official forces all bystanders to consume their red pill, which is revealed as a memory pill meant to cause consumers to forget all memories from time of consumption to 12 hours ago. Cassia destroys the pill, and faked consuming it, but fails to trick the Official. However, the Official allows the matter to pass. At the very end of the novel, it is revealed that she played a critical role upon entering Ky Markham into the Matching pool, despite the fact that Ky was an Aberration, and should not have been in there.