Olive is a 12-year-old student who feels invisible due to her parents' frequent absences and her peers' general indifference. Behind her quiet exterior, she is a highly skilled acrobat and gymnast. Upon transferring to the Reforming Arts School (RASCH), she joins a specialized covert group of students known as the Misfits.

Phil is the resident technology specialist and inventor for the Misfits. She wears a headscarf and frequently designs customized gadgets, from enhanced communication devices to specialized fog goggles. She struggles with self-confidence but forms a strong connection with Olive through their shared interests.

At nine years old, James is the youngest member of the Misfits and a certified genius. He possesses an encyclopedic memory of historical facts and trivia. While he excels at mental puzzles and simulations, he frequently hesitates during physical combat situations.

Iggy is the primary combat specialist for the Misfits. She acts fearlessly in dangerous situations and is highly skilled in math and physics. Her aggressive approach makes her an excellent fighter, but she frequently struggles to communicate empathetically with her teammates.

Theo is a charismatic and easygoing member of the Misfits. He is a fluent polyglot who uses his charm to bypass security and enter adult spaces with ease. His relaxed attitude brings levity to the group but occasionally leads to careless logistical mistakes.

Modest is a towering, muscular former ballet dancer who teaches grace, balance, and controlled movement at the academy. He wears bright colors and serves as a warm, encouraging mentor to the Misfits, tailoring his physical training to each student's unique abilities.

Monica is a two-time lightweight boxing champion who teaches martial arts and fight techniques. She dresses strictly in dark clothing and operates with severe hearing loss from an old boxing injury. She maintains a tough, no-nonsense demeanor while fiercely protecting her students.

Dr. Corbin Zang is Olive's mother. Her demanding career requires constant international travel, keeping her away from home for months at a time. She struggles to understand her daughter's needs, often substituting expensive snow globes for genuine emotional connection.

Dr. Zang Corbin is Olive's father, who spends nearly all his time traveling for business alongside his wife. He regularly brings Olive souvenirs from his trips, entirely unaware that she has no interest in collecting them.

Mimi is Olive's maternal grandmother and closest confidante. Before her recent disappearance, she taught Olive acrobatics, tightrope walking, and resilience, providing the only true emotional warmth in her granddaughter's early life.

Auntie Winnie is a sweet, quiet older woman who works as an assistant at the island's bakery. She knits and wears practical clothing, acting as a gentle, grandmotherly presence for the students and staff at the Reforming Arts School.

Sunny is the eccentric dean of the Reforming Arts School. She guides Olive through a bizarre entrance exam known as the Conundrum and constantly worries about the school's fragile financial situation.

Brood serves as the resident maintenance man at Foggy Manor. He walks with a noticeable limp and handles repairs across the campus, frequently finding reasons to visit the local bakery to converse with the staff.

Poppy is the owner of Butter Bakery and a former finalist on a famous British baking television show. Her pastries are a major source of revenue for the school and are frequently delivered to community outreach centers.

Yashika, who prefers the nickname Yash, serves as the administrative assistant to the dean of the Reforming Arts School. She operates an amphibious vehicle known as the BoBu to ferry students and staff across the water to Foggy Island.

Zeke is an attractive student at the Reforming Arts School whose family has attended the institution on scholarships for several generations. He is observant and kind, taking the time to check on classmates who appear to be struggling.

Primrose is a pink-haired student who quickly establishes herself as a bully at the Reforming Arts School. She frequently mocks newcomers and lower-performing students to assert her social dominance.

Dame Gloria is an extremely wealthy patron whose continued financial support is necessary to keep the Reforming Arts School open. She possesses a collection of highly valuable jewelry, making her a high-profile target for thieves in the city.

Sterling is Dame Gloria's adult grandson and a theater actor. He previously lost acting opportunities due to a gambling problem and views the school's gala performance as his chance to revive his stalling career.

Ruby is the police chief of San Francisco. She coordinates local security efforts with the school's staff and provides official authorization for surveillance operations across the city.

Jinx is a young woman who drives a car full of cat carriers and volunteers at a local community center. She frequently pawns and reclaims valuable jewelry under suspicious circumstances.

Benny is the proprietor of Benny's Pawn Shop in San Francisco. He purchases a valuable brooch for a fraction of its worth, only to be robbed and restrained by the seller moments later.

Smote is a hostile teenager who wears a football jacket and verbally harasses the Misfits. He specifically targets Olive's heritage and Phil's headscarf, prompting a swift physical confrontation.

Captain Crunch is the stubborn commanding officer of a historic ship holding a private event. He refuses to evacuate his vessel until he is tricked by an authoritative voice over the radio.

The Aphrodite Cat is a butterscotch-colored Himalayan show cat caught up in a citywide smuggling operation. She unknowingly wears a collar containing highly valuable items and is transported frequently in pet carriers.