Cobra is a space pirate who travels the galaxy in search of treasure and rare items, stealing them with a distinctive sense of style. While he often presents himself as an innocent and funny individual who acts like a clown, this persona contrasts with a much harder side to his character. When the situation demands it, he becomes a hard-boiled man fully committed to duty and friendship, boldly facing any challenge, no matter how difficult. This duality defines his approach to life, allowing him to navigate both lighthearted moments and life-threatening dangers with equal ease.

A significant event in his past reveals a deeper layer of fatigue from his endless battles against the evil Pirate Guild, an organization that plans to conquer the universe. The relentless struggle led him to erase his own memory and go into hiding, living as a regular company worker. This period of forced normalcy lasted for five years until a certain event triggered the return of his memories, prompting him to abandon his mundane existence and resume his former extraordinary life. This decision underscores his core motivation: the call of adventure and the fight against injustice are inescapable parts of his being.

In his adventures, Cobra pilots a high-speed spaceship named the Turtle. He is frequently accompanied by his partner, Lady Armaroid, a female-type armaroid whose body is constructed from a substance known as live metal. The most distinctive aspect of his arsenal is his left arm, which is an artificial limb equipped with an extremely powerful beam gun known as the Psychogun. This weapon is directly connected to his brain, capable of shooting out mental energy and targeting enemies without needing a direct line of sight. However, the Psychogun is not without its limits; it drains Cobra's mental energies after extended use. For backup, he carries an old-fashioned Magnum revolver, a traditional tool for situations where his primary weapon might be impractical or too powerful. His character design and peculiar sense of humor were inspired by the famous French actor Jean-Paul Belmondo, particularly the roles Belmondo played in films.