Keith Goodman, known as the hero Sky High, is a central figure within the hero community of Sternbild. A professional through and through, his background is tied to the Poseidon Line, a major transportation conglomerate, which serves as his sponsor. His NEXT ability, which allows him to manipulate the wind, first manifested when he was eighteen years old, which is considered relatively late compared to many of his peers. Before the arrival of Barnaby Brooks Jr., he held the title of King of Heroes, a ranking based on points earned from heroic activities and popularity, a position he maintained consistently since his debut.

In terms of personality, Sky High is defined by his unwavering optimism, politeness, and genuine sincerity. He is famously known for his cheerful and formal manner of speaking, often repeating his catchphrases such as Thank you! And thank you again! when addressing his fans. While this earnest and somewhat dramatic demeanor can come across as naive or airheaded, his fellow heroes and producer deeply respect him. His opinions are consistently valued by the group, often uniting them where others might fail. Beneath his gentle and courteous exterior, he possesses a fierce and determined core, demonstrating a strong commitment to justice that he views in largely clear-cut terms. He adheres strictly to the rules and orders given by his company and Hero TV, believing that upholding the social order through these channels is paramount. His daily routine is a testament to his discipline, consisting of morning and evening exercise, training sessions, daytime walks with his beloved dog, John, and nighttime patrols of the city, which he does on his own initiative.

Sky Highs primary motivation is a deep-seated desire to make people happy and to fulfill the expectations placed upon him as a top hero. He takes his responsibility seriously, feeling a great need to protect the citizens and live up to his role as a symbol of safety and hope. His identity is heavily invested in his performance as a hero, which becomes a significant source of internal conflict when he loses his ranking. This event sends him into a deep slump, not out of jealousy for the lost title, but from the crushing sense that he has failed the people who believed in him. For ten months, he suffered in silence, unable to share his feelings of inadequacy with anyone.

Within the story, Keith Goodman serves as a foil to the protagonist, Kotetsu T. Kaburagi, also known as Wild Tiger. While Kotetsu represents a more instinctual, rule-breaking hero who prioritizes saving lives above all else, Sky High embodies the ideal company-sponsored hero who works within the system. Despite their different approaches, the two share a mutual respect; Sky High has supported Kotetsus plans and addressed him formally as Mr. Wild, while Kotetsu has entrusted Sky High with critical tasks and acknowledged his skill.

The most pivotal moment in Sky Highs development revolves around his relationship with a mysterious girl named Sith, whom he met in a park during his slump. Unbeknownst to him, she was an advanced android created from the research data of Barnabys parents. Finding solace in her silent company, he began to recover his lost confidence. In a tragic turn, Sith malfunctioned and went on a rampage. Sky High, not knowing her true identity as the girl he had grown fond of, was forced to destroy the android with his full power. The emotional aftermath was profound; the next day, he was seen waiting for her on their usual bench with a bouquet, a heartbreaking scene that solidified his emotional depth and allowed him to fully overcome his crisis.

Later in the series, his memory was manipulated by a central antagonist, causing him to view Kotetsu as an enemy. After his memories were restored by Kotetsus daughter, who had copied another heros power, he rejoined the fight against the true threats. He also formed a notable partnership with the hero Fire Emblem, and their time working together led to introspection for Sky High, as his partner grew frustrated with his flawless public facade. This partnership ultimately revealed his hidden insecurities and forged a stronger bond between them. Even when bureaucratic actions temporarily suspended his hero license, Keiths commitment to his duty remained unshaken, and he continued to patrol the streets at night, defying orders to uphold his personal creed of protecting others.

As a hero, Keiths notable abilities center on wind manipulation. He can compress air to create powerful gusts for long-range attacks or dense barriers for defense. His signature finishing move, which he announces by calling out his own hero name, is a concentrated blast of this wind energy. While his power allows him to float and control his position in the air, he cannot generate thrust on his own; to achieve true flight and high-speed aerial maneuvers, he relies on the jet pack built into his hero suit.