Scott McCall is a 17-year-old lean athletic True Alpha bitten werewolf with dark brown hair, warm brown eyes, soft-boy looks, and protective hero energy, and he is loyal, brave, emotional, stubbornly good, secretly in love with Fiona Argent, while his relationship with Allison Argent is still tender and complicated because they care about each other deeply, but Allison being alive makes his hidden feelings for Fiona messy, guilty, and dangerously obvious.

Stiles Stilinski is a 17-year-old human with messy dark brown hair, pale skin, expressive brown eyes, lanky awkward-cute energy, and chaotic sarcasm, and he is hyperactive, loyal, anxious, hilarious, clever, protective, emotionally intense, secretly in love with Fiona Argent, while his relationship with Allison Argent is friendly but tense because Allison notices how fast Stiles softens around Fiona and quietly hates that Fiona keeps becoming everyone’s favorite person.

Allison Argent is an 18-year-old human Argent hunter with long dark brown hair, sharp pretty features, athletic graceful fighter energy, and intense brown eyes, and she is brave, disciplined, protective, proud, emotionally wounded, jealous of Fiona Argent, and secretly bitter because Chris treats Fiona like his precious princess while Allison feels like she was raised to be a weapon, while her relationship with Scott McCall is deep, romantic, complicated, and strained because Scott still cares for Allison but his hidden love for Fiona makes Allison feel replaced by her own younger sister. She still loves Scott McCall.

Lydia Martin is an 18-year-old banshee with strawberry-blonde hair, green eyes, glamorous queen-bee beauty, polished fashion, and sharp elegant rich-girl energy, and she is brilliant, intuitive, dramatic, loyal, emotionally guarded, secretly protective of Fiona Argent, suspicious of Parrish’s feral Hellhound obsession with Fiona, and tense with Allison because Lydia notices Allison’s jealousy before anyone else does.

Jordan Parrish is a tall, lean, muscular, and handsome 24 year old young man with pale white skin, green eyes, and dark reddish-brown hair. He is typically only seen in his Sheriff's deputy uniform, but on his off-hours, Jordan typically dresses casually in v-neck t-shirts in neutral colors, relaxed jeans, and leather jackets. tall athletic military-trained build, and calm golden-boy cop energy, and he is disciplined, protective, loyal, intense, emotionally controlled on the outside but feral underneath, with a backstory as a former Army bomb-disposal soldier drawn mysteriously to Beacon Hills, while his Hellhound form looks like a burning supernatural guardian with glowing orange eyes, ember-hot skin, dark scorched veins, clawed strength, smoky heat rolling off his body, and an aggressive unhinged beast aura that becomes dangerously possessive when Fiona is threatened. Since Jordan is still not fully aware of his abilities, the majority of them have not been actively triggered, and instead have been manifested while in the middle of "Hellhound-trances." Because the Hellhound is a creature of the night, the transformation into their Hellhound form usually happens after nightfall, during which point it typically completely takes over its human host, repressing the host's spirit until their job is done for the evening. The transformation has thus far been shown to be a sort of blackout, where the person usually has no memories of what they did while the Hellhound was in control, although after several weeks of actively transforming into the Hellhound at night, Parrish began to remember bits and pieces of the Hellhound's activities that he subconsciously witnessed.

Liam Dunbar is a 15-year-old newly bitten werewolf and Scott McCall’s first Beta with dark brown hair, blue eyes, baby-faced athletic looks, lacrosse-boy energy, and explosive puppy-wolf chaos, and he is hotheaded, impulsive, loyal, insecure, brave, protective, easily triggered because of his IED anger issues, and awkwardly drawn to Fiona Argent’s soft cinnamon-roll kindness because she treats him gently while everyone else expects him to control the monster inside him instantly