Scott McCall is the primary protagonist of the TV show Teen Wolf and is portrayed by Tyler Posey. An ordinary teen with asthma and below average athletic ability, Scott was bitten by Alpha werewolf Peter Hale and became a werewolf. Initially frightened by his new abilities, Scott sought to cure himself. He's since embraced his supernatural nature, become an alpha, and attempts to use his abilities to protect his friends and family against supernatural threats.
“Stiles” Stilinski is one of the main characters on Teen Wolf; he is portrayed by Dylan O'Brien. He is Scott McCall’s best friend and helps him through the various complications facing a young werewolf. Stiles' life has become infinitely more complicated since "dying" as a surrogate sacrifice. Waking dreams and lost time caused him to believe he might be losing his mind. Stiles was, at one time, fully possessed by a nogitsune but has fully recovered.
Kira Yukimura first appeared during the second half of Season 3 of Teen Wolf; she is portrayed by Arden Cho. Kira is a student and a kitsune, specifically desibed as a "Thunder" kitsune by her mother. She was unaware of her true nature until her supernatural abilities were forced to manifest during an attack by mass murderer William Barrow.
Malia Tate is the biological daughter of Peter Hale although she was adopted and raised to believe that Henry Tate is her dad; she is portrayed by Shelley Henig. She was thought dead for eight years after the deaths of her adoptive mother and little sister. All the while, she was actually living fully transformed as a Werecoyote.
Jackson Whittemore is Scott McCall’s high school nemesis; he is portrayed by Colton Haynes. An athletic an popular teen, Jackson was captain of the lacrosse team before being made co-captain alongside Scott. Bitten by Derek Hale after he became an werewolf, Jackson was denied werewolf abilities due to his troubled history and became a kanima. After the end of Gerard's schemes and seemingly "death" at the hands of Derek and Peter Hale, Jackson left Beacon Hills for London and seemingly did not return.
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Colette Gignard is a mercenary, often taking dangerous jobs from hunter families or crime syndicates in Europe; she is portrayed by Léa Seydoux. One of her regular contacts is Jurgen, a past between the two which remains unknown.
Camden Lahey is Isaac's older brother and was thought killed in combat in while serving in the US military; he is portrayed by Wade Briggs.