Hayden

Hayden Romero is a recurring character who made her first appearance in the fifth season of Teen Wolf. She was first introduced as a sophomore at Beacon Hills High School who worked as a server at the Sinema nightclub and who was a classmate of her close friend Mason Hewitt and her boyfriend, former frenemy, and fellow Beta Werewolf Liam Dunbar.

Though she was initially believed to be an ordinary human, it was eventually revealed that she had been turned into a Chimera by the Dread Doctors in the late summer or early autumn of 2012 due to the fact that she had two sets of DNA as a result of a kidney transplant. After her pseudo-supernatural status was revealed, she demonstrated Werewolf characteristics, such as glowing gold eyes, claws, fangs, and supernaturally-enhanced senses, though the other half of her Chimera nature was unknown for some time.

However, her condition soon began to deteriorate, and it became clear when she began bleeding mercury that she would be considered a "failed" Chimera. Though she ultimately died from a mercury overdose in Status Asthmaticus, she was resurrected by Theo Raeken at the end of the episode using a mysterious green compound of the Dread Doctors' design.

At the start of Season 5, she was informed by Theo that she was also part-Werejaguar, and it appeared as though she had joined his Chimera Pack out of gratitude that he brought her back to life. However, after several illuminating conversations with Deucalion and after seeing for herself that Theo treated the members of their pack like pawns for his own agenda, she ultimately pledged her allegiance to Liam, Scott McCall, and the McCall Pack

In the season finale, after being gravely injured by the Beast, Hayden requested that Scott give her the Bite, a request that he granted out of fear that she would die again from her wounds. The Bite was successful, and Hayden is now officially a Beta Werewolf, quickly integrating herself as an official member of the McCall Pack due to being Scott's second bitten Beta.

As of the midseason premiere of Season 6, Hayden has since moved away from Beacon Hills with her human sister Valerie Clark in order to protect her from supernatural threats that are all too common in their hometown. She ended her relationship with Liam on somewhat good terms, though it is unknown where specifically she moved.

Little is known about Hayden's early history, but she has apparently been raised by her older sister, Sheriff's deputy Valerie Clarke, for quite a while. When Hayden was in sixth grade, she walked into the hallway to find Liam Dunbar and another fellow student in the middle of a violent fight. When she tried to intervene, Liam, overwhelmed by rage, punched her in the face and broke her nose. Hayden then became so angry that she punched him back, breaking his nose as well to get even. Unfortunately for them, this happened right before school picture day, and both Hayden and Liam had their yearbook photos taken with black eyes and taped noses.