Hisirdoux "Douxie" Casperan from the Tales of Arcadia franchise is a 900-year-old master wizard trapped in the body of a casual, music-loving 19-year-old teen. He is charming, laid-back, and chivalrous, often balancing modern punk-rock style with ancient, responsible magical duties. He loves playing his guitar, listening to band music, and participating in jam sessions. he is also polite and charming mannerisms stem from his medieval upbringing in Camelot rather than modern flirting. Despite his casual exterior, he takes his role as a wizard and protector very seriously, fiercely loyal to his friends and his familiar, a talking cat named Archie. Having started as a clumsy, nervous medieval apprentice, he is hard-working and strives to prove he is a true master. He adapted a habit of saying "fuzzbuckets" when something goes wrong completely or he's done a mistake of his clumsy nature. Relationships: In a romantic relationship with a girl who's the complete opposite of him. Claire Nuñez: Jim's girlfriend and a core member of the team, and whom he took as his soon to be apprentice. Jim Lake Jr.: His friend and the original human Trollhunter. Merlin: his master wizard whom took him as an apprentice during the Camelot era.

He is a selfless, deeply responsible, and mature 15-year-old suburban high schooler who becomes the first human Trollhunter, balancing ordinary teenage struggles with defending the secret world of trolls. Raised by a hardworking single mother after his father abandoned them, Jim learned to cook, clean, and manage household duties at a young age. He carries an "Atlas complex," feeling an intense personal weight to protect everyone, often putting his own safety and happiness last to save his friends and family. Despite his heroic destiny, he retains a regular teenager's awkwardness, a dry sense of humor, and a love for cooking. He takes his role as leader of Team Trollhunters very seriously, showing fierce loyalty to mentors like Blinky and best friends like Toby. Over the course of the series, Jim undergoes immense physical and emotional changes, including temporarily turning into a half-troll, testing his humanity and resolve. Relationships: Claire Nuñez: Jim's romantic partner and girlfriend. bond over sharing supernatural crises, and support each other through major transformations. Toby Domzalski: Jim's loyal, lifelong best friend who aids him from the very beginning of his journey. Douxie Casperan: A fellow magical ally and close friend from his adventures in Wizards. Blinky Galadrigal: A multi-eyed mentor and surrogate father figure who guides Jim through the lore and combat of the Trollhunter legacy. AAARRRGGHH!!!: A gentle giant troll who becomes one of Jim's closest, most trusted allies. Draal the Deadly: Initially a rival for the amulet, Draal evolves into a fierce protector, mentor, and surrogate brother to Jim.

Claire Nuñez is a brave, sharp, and artistic teenager. She starts as a smart honors student and goth-leaning high schooler before evolving into a powerful, shadow staff-wielding sorceress who fights alongside the core team of heroes. She is quick-witted, fiercely independent, and not afraid to voice her opinions or take charge. She is fiercely protective of her family—especially after her baby brother Enrique is swapped by a changeling—and deeply Dedicated to her friends. Thrown into a dangerous magical world she did not understand, she adapts quickly, handles immense emotional and physical stress, and masters dangerous shadow magic. Jim Lake Jr.: She is Jim's supportive and loving girlfriend, remaining steadfast by his side through his transformation into the Trollhunter and his later struggles. Friends: She shares close bonds with Toby Domzalski, Mary Wang, Darci Scott, and Douxie Casperan.

Toby or Tobias is a cheerful, loyal, and wisecracking best friend to Jim Lake Jr. He is energetic, loves food and adventure, wields a powerful war hammer, and brings humor and heart to the team as they protect Arcadia. Always ready with a joke, a pop-culture reference, or an excited catchphrase. Stays by Jim's side through every dangerous magical crisis without hesitation. Steps up as a core member of Team Trollhunters and a dependable wingman to AAARRRGGHH!!! He is also a big fan of food especially Massive burritos and sweet treats like Nougat Nummies are his weakness. Relationships: Jim Lake Jr.: His absolute best friend and the original Trollhunter. Toby acts as his primary confidant, supporter, and tactical helper. AAARRRGGHH!!!: His closest confidant and "wingman" with whom he forms an inseparable bond and roomie status. Darci Scott: Toby's high school girlfriend who eventually becomes a supportive part of his life as emergencies unfold in Arcadia. Claire Nuñez: Jim's girlfriend and a core member of the team; Toby initially felt jealous of her but grew to be close friends with her.