Logan is the twelve-year-old son of the Candymaker and has lived his entire life inside the Life is Sweet factory. He possesses mysterious burn scars across his body, though he maintains a positive outlook and rarely considers his physical appearance. He aspires to invent the "Bubbletastic Choco-Rocket" and work in the Tropical Room, yet he deeply doubts his own candy-making abilities. Despite his sheltered upbringing, he is big-hearted and eager to welcome the other contestants.

Miles is a cautious twelve-year-old boy whose life is ruled by intense fear and anxiety. After witnessing what he believed was a girl drowning in a lake, he developed severe phobias of everyday objects like rowboats, pancakes, and the color pink. He constantly worries about fatal accidents, searching for signs in random book passages to help him cope. To soothe his mind, he frequently daydreams about a peaceful afterlife.

Daisy presents herself as a cheery, fun-loving twelve-year-old girl entering the candy-making competition. Beneath her upbeat exterior, she possesses unusual physical strength and harbors secret motives connected to her family's line of work. Raised by highly successful parents, she strives to meet their strict expectations while secretly longing for genuine connections with kids her own age.

Philip is a twelve-year-old competitor who arrives at the factory with an arrogant attitude and a clear desire to keep others at arm's length. He refuses to eat chocolate pizza with the group and constantly scribbles in a private notebook. Driven by a long-held grudge against Logan and a desire to impress his wealthy businessman father, Philip views the competition as a means to an end. He secretly suppresses his true passion for music to avoid his father's disapproval.

The Candymaker is Logan's father and the proud owner of the Life is Sweet candy factory. He is a warm, trusting man who treats his employees like family and takes great pride in his craft. He places a strong emphasis on kindness and creativity, establishing a supportive environment for the four young competitors.

Logan's Mom is a nurturing presence at the Life is Sweet factory. She cooks for the boys when they visit Logan's home and frequently writes encouraging, philosophical notes for her son. She is deeply protective of Logan, carefully sheltering him from a world she fears might treat him differently because of his appearance.

Henry is the elderly marshmallow maker at Life is Sweet. He serves as a grandfather figure to Logan, offering wisdom and reassurance when the boy doubts his abilities. Henry is observant and empathetic, quickly noticing the hidden pain behind Philip's abrasive exterior.

Max is the primary tour guide at the Life is Sweet factory. He explains the equipment and the rules of the competition to the young participants. He maintains a lighthearted, friendly atmosphere while ensuring the children respect the factory's machinery.

Philip's Father is a wealthy, demanding businessman who values profit and power above all else. He teaches his son to be ruthless and views artistic pursuits as a waste of time. He holds ulterior motives regarding the Life is Sweet factory and pressures Philip to win the competition.

Reggie is the personal driver for Philip's father. Unlike his employer, Reggie possesses emotional intelligence and acts as a grounding force for Philip. He understands Philip's secret interests and tries to guide the boy away from his father's toxic influence.

AJ is a teenager tasked with monitoring Daisy while her parents are away. He provides her with logistical support and instructions during her time at the factory. Though he frequently annoys Daisy, he remains a consistent presence in her daily activities.

Miles's Father is a supportive parent who wants to see his son overcome his crippling anxieties. He encourages Miles to participate in the candy contest, hoping the experience will help him process his trauma and move forward.

Miles's Mother supports her son's entry into the competition. She handles the practical aspects of getting him to the factory, sharing in the family's hope that the experience will be positive for him.

Daisy's Parents are highly skilled professionals who travel frequently for their work. Their intense careers set a demanding standard for Daisy, who idolizes them and shapes her own behavior to earn their respect.