As Westlake High reels in the tragic suicide of autistic Damon Albright, whom his friends accused of ruining their lives after a party gone wrong, small town girl Joyce “Joy” Miller starts an investigation to know the real Damon was before he killed himself. But after Joy interviews his friends one by one, they grow humiliated and tormented by Damon’s ghost, whom only they can see and no one else can.
Joyce “Joy” Miller: the lead character and aspiring journalist in charge of Damon’s story.
Damon Albright: the title role who committed suicide after years of social rejection due to his autism. His ghost only returns to torment his friends, who can see and hear him, when Joy finishes her interviews. Ironically, he also returns to meet his social worker Rachael one last time, but informs her that she did a wonderful job at being there for him and that she is the only one not to blame for his suicide.
Brad Miller: a receptionist at a stockbroker’s office and Joy’s eldest brother.
Todd Miller: a bassist/lead singer for a local garage band and Joy’s second older brother.
Drew Krakowski: a redheaded sculptor who grew isolated from social life after Damon’s death, which he accuses Abby of. However, he warms to the equally-reclusive Tiffany, leading to the pair becoming friends-with-benefits and eventual romance; Todd recruits him to be in his entourage.
Abby McLaughlin: a flower child and aspiring actress who broke off her friendship with Damon, forcing the latter into depression.
Marcus Gallagher: a pot-loving, metalhead slacker who finds minimal success in his academics without doing any work.
Rainn Phoenix: a goth girl and wannabe magician. Out of desperation, she strikes up a relationship with the goofy yet sensitive Hulk.
Noah Clarke: a wrestler who also betrayed Damon when he “outed” the latter to the school for rejecting his feelings; in actuality, Damon was helping him cope with Jennie rejecting his feelings leading to their eventual hookup. He became a target of Hulk’s when the latter discovered the truth and ambushes him.
Jennie Wong: a wannabe novelist who idolizes Joy’s father Craig and a pansexual advocate for the school’s LGBTQIA club. Originally, Noah had developed feelings for her, but rather return them, she protects him by turning his advances down and not wanting to risk a friendship into romance, leading to the former’s hookup with Damon. At the end, after Hulk had attacked Noah, Jennie reconciles with the latter and helps him come to terms with bisexuality, by setting his sights on Marcus.
Eugene “Hulk” Hernandez: an offensive lineman and Damon’s childhood friend. Sometime after Damon killed himself, he eventually discovered the truth behind their hookup, and accused Noah of killing Damon by having Noah beaten up.
Tiffany Patel: a graffiti artist to whom Drew warms up to after Damon’s death.
Zach Basulto: a fullback on the football team who later quits to overcome his use of painkillers and Gisele’s overprotective brother.
Gisele Basulto: an aspiring model, Damon’s ex-girlfriend, and Zach’s much younger sister.
Rachael Martin: a social worker for the school’s sophomores.
Thaddeus Martin: a welder turned factory manager and Rachael’s husband.
Chelsea Ingraham: an ASL teacher/interpreter and Damon’s case manager.
Tom Howe: a gay CIA analyst turned history teacher favored by Damon. After Damon’s death, he was promoted to principal and rented out his guesthouse to Jennie and Noah.
Craig Miller: a veteran television writer, Angela’s hubsand, and father to Joy, Brad, and Todd.
Angela Miller: a veteran comedian, Craig’s wife, and mother to Joy, Brad, and Todd.
Jasira Patel: an education specialist whom Damon despised and Tiffany’s overbearing aunt. After relapsing to her gambling addiction, Tom sought to avenge Damon’s suicide by firing her and setting her up for extortion.
Duncan D’Amico/Kid X: a drug dealer who crashed Damon’s party and became the main reason how Damon lost his friends. Tom had also expelled him for drug usage, inappropriate behavior, and hostility among the teachers and athletes. He died after a gang of prisoners jumped, raped, and stabbed him, on Tom’s orders.
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