Ken-Goh is a prominent supporting character in the anime Eureka Seven, serving as a key member of the outlaw group known as Gekkostate. He holds the crucial roles of both the owner and the chief gunner of the group's airship, the Gekko, and is recognized as one of its founding members. His background is deeply rooted in military service; it is strongly implied that he served in the United Federation military alongside Holland Novak, the leader of Gekkostate, before they both deserted to form their own collective. This shared history is a fundamental part of his identity, and he carries the demeanor of a seasoned, dutiful, and gruff military man who became disillusioned with the organization he once loyally served.

In terms of personality, Ken-Goh is the epitome of stoic resolve. He is a man of few words, characterized by an unshakeable composure that remains unaffected by even the most chaotic or stressful situations. This calmness under fire is precisely what makes him such a master of his craft. He is fiercely loyal, with his allegiances divided equally between Holland and the ship he owns, the Gekko; he is portrayed as willing to fight to the death for the sake of both. His motivations are straightforward and tied to this loyalty. Having followed Holland out of the military, his primary drive is to support the crew and the mission of Gekkostate, which involves evading the military, seeking truth, and protecting their own. He finds purpose in his role as the anchor and protector of the vessel.

Ken-Goh's role in the story is largely functional but vital. As the Gekko's chief gunner, he is the crew's weapons specialist and the individual responsible for manning the ship's artillery during aerial confrontations with military forces. When battles erupt, he is the one who opens fire, providing defensive and offensive capabilities that are essential for the crew's survival. His expertise is so renowned that Holland himself occasionally refers to him with the respectful nickname Maestro. Beyond his combat duties, he is also the technical owner of the Gekko, giving him a unique stake in the wellbeing of the group's mobile home and headquarters.

His key relationships are primarily with the other founding members of Gekkostate. His most significant tie is to Holland Novak; he is one of Holland's most trusted and reliable comrades, a relationship forged in their shared military past and their mutual decision to leave it behind. He also shares a long-standing history with other original crew members like Talho Yuuki and Hap. While he interacts less directly with newer members like the protagonist Renton Thurston, his steady presence contributes to the overall dynamic of the crew. In quieter moments away from his gunnery post, Ken-Goh reveals a more contemplative side, as he is an avid painter. His artwork is often featured in Gekkostate's illegal magazine, ray=out, highlighting a creative passion that contrasts with his tough exterior.

Ken-Goh does not undergo a dramatic personal transformation over the course of the series, but his situation does evolve after the main narrative concludes. His development is more about consistency and reliability, remaining the steadfast foundation upon which the more volatile members of the crew can rely. In the epilogue story Eureka Seven: The Day After, it is shown that he eventually resigns from the Gekkostate. Along with fellow crew members Woz, Jobs, Moondoggie, and Gidget, he uses the Gekko to start a shipping business, demonstrating an ability to adapt to a peaceful life while still utilizing his skills and his beloved ship. His notable abilities are centered on his exceptional marksmanship. His skill with the Gekko's cannons is considered legendary among the crew, and his aim is nearly infallible, making him a formidable opponent in any aerial skirmish. His steady demeanor directly contributes to this ability, as he is a master of focus and precision under pressure.