Nainoa is the youngest child of the Flores family and a student at Kahena Academy. Following his miraculous encounter in the ocean, he discovers an extraordinary ability to heal injured people and animals through physical touch. His extreme empathy causes him to absorb the pain of those he treats, making his gift physically exhausting. He carries a heavy burden of expectation as his community increasingly views him as a divine figure.

Malia is the spiritually devout matriarch of the Flores family who works as a clerk at a local grocery store. Her polytheistic beliefs are deeply rooted in the legends of ancient Hawaiian culture. She views her youngest son's abilities as a sacred intervention meant to save their family from poverty and preserve their native island heritage against encroaching outside influences.

Augie is a former college football player who struggles to maintain financial stability for his household. After losing his job at a sugarcane plantation, he takes employment handling baggage at the airport. He frequently uses jokes and humor to mask his insecurities regarding his inability to provide a prosperous lifestyle for his wife and children.

Kaui is the highly intelligent daughter of the Flores family. She possesses a blunt and realistic perspective that directly contrasts with her mother's spiritual devotion. Seeking to step out of her brother's shadow, she pushes herself to excel in academics and hula dancing before leaving the islands to study engineering in San Diego. She enjoys physical challenges like rock climbing and scaling abandoned buildings.

Dean is the physically imposing oldest son of the Flores family. Relying entirely on his athletic prowess, he dedicates himself to basketball in hopes of securing a college scholarship and lifting his family out of poverty. He projects a macho exterior and struggles with a quick temper, yet he remains deeply protective of his siblings.

Erin is a pragmatic paramedic working in Portland, Oregon. She works directly alongside Nainoa and observes his highly unusual medical successes in the field. Recognizing that his talents go far beyond standard emergency training, she encourages him to seek larger platforms for his abilities.

Khadeja is a mother living in Portland who develops a relationship with Nainoa. She is highly observant and quickly notices his unique, calming connection to nature and animals. She provides a sense of emotional grounding for him on the mainland.

Rika is Khadeja's young daughter. Her well-being dictates her mother's careful approach to dating, requiring any new partner to demonstrate gentleness and reliability.

Van is a college student in San Diego characterized by a hacked bob haircut and an intense demeanor. She bonds over rock climbing and exploring abandoned areas. Their connection introduces new personal questions about identity and belonging during the transition to mainland life.

Skylar is a friend of Dean's who participates in rough physical games. He suffers a severe hand injury during a fireworks accident, which inadvertently becomes the catalyst for demonstrating miraculous healing abilities to the broader public.