Kane Blueriver is the main protagonist of the science fiction series Lost Universe. He is a twenty-year-old young man who works as a professional Trouble Shooter, also known as a Trouble Contractor, taking on dangerous or difficult cases that are too much for ordinary authorities to handle. His most significant inheritance comes from his grandmother, Alice, from whom he received the legendary white遗失战舰, the Sword Breaker, a powerful ship from an ancient civilization that serves as his primary base of operations and home.

In terms of personality, Kane is defined by a somewhat contradictory blend of traits. He is a热血 and straightforward individual, facing the universe's challenges with an optimistic and free-spirited attitude, always confident that he can overcome any trouble that awaits him. However, this optimism is paired with a famously short temper. He is known for being hot-headed and easily angered, a trait that surfaces frequently in his interactions. His most notable personal quirks include an intense fondness for wearing black capes, to the point of having an entire wardrobe full of them, and a violent dislike for anyone who insults his fashion sense or, due to his youthful features, mistakes him for a girl. He often quotes the wise sayings of his grandmother, indicating that her memory and teachings are a constant guide for him.

Kane is driven by a strong sense of justice and a desire to combat evil, specifically the criminal organization known as Nightmare, which is linked to the dark遗失战舰, the Dark Star. He is also motivated by a personal desire for revenge against Nightmare for the death of his grandmother, a tragedy that also explains his deep attachment to his black cape. Throughout the story, he pilots the Sword Breaker alongside his two main partners. One is Canal, the ship's main computer who manifests as a holographic projection of a green-haired woman. The other is Millie, a young woman who joins their team after her detective agency is shut down and who secretly harbors romantic feelings for Kane. A key part of his character development involves his relationship with Millie, as he continues to trust her unconditionally even after learning she is the granddaughter of the leader of the Nightmare organization.

Kane possesses several notable abilities that make him a formidable fighter and pilot. He has demonstrated extraordinary hearing and a keen ability to sense danger before it strikes, giving him a sharp edge in combat situations. His signature weapon is the Light Blade, also known as the Psi-Blade, a weapon of pure mental energy that requires tremendous mental strength and willpower to wield effectively. In addition to his combat skills, he is a certified pilot with a B级 license for operating宇宙船, showing his mastery over his inherited遗失战舰. The fate of Kane Blueriver varies depending on the version of the story. In the anime television series, he meets a悲壮结局, disappearing into the vastness of space alongside the Dark Star. However, in the original light novel series, the story concludes with a happier, more团圆 ending, where he and his ship return safely.