Jesse Blue, also known by the name Perios, is a significant antagonist introduced in the American adaptation of the series. His character arc follows the transition from a promising hero to a bitter villain, a fall from grace that serves as a central source of conflict against the Star Sheriffs.

Before his turn to evil, Jesse Blue was a highly talented and ambitious cadet at the Cavalry Command training facility on Alamo. He was considered one of the best recruits, displaying great intelligence, strong leadership potential, and a deep-seated drive to prove himself as the top candidate. His personality during this period was marked by immense self-confidence, bordering on arrogance, fueled by a need for achievement and recognition. This promising career came to an abrupt end when he met April Eagle. Jesse developed an intense infatuation with her, but his aggressive and forceful advances were firmly rejected, an incident that left him humiliated and enraged. Unable to accept this rejection and blaming Saber Rider and the other Star Sheriffs for his disgrace, Jesse quit the academy and subsequently defected to the side of the alien Outriders, embarking on a path of vengeance.

As a villain, Jesse Blue is characterized as a cunning, cold-blooded, and supremely arrogant strategist. He sheds any remaining sentimentality, believing that emotions are a weakness to be eliminated in the pursuit of success. His primary motivation shifts from a desire for approval to an all-consuming need for power, control, and revenge against those he believes wronged him, particularly April and Saber Rider. He serves Nemesis, the leader of the Outriders, with calculated loyalty, quickly proving himself to be one of the most dangerous and effective commanders due to his intimate knowledge of human psychology and Cavalry Command tactics. His schemes are notably sophisticated and deceptive, often playing on the emotions of his enemies to achieve his goals. As the series progresses, his ambition grows, and he eventually attempts to usurp Nemesis and seize control of the Outrider forces for himself, demonstrating a complete descent into megalomania.

Within the story, Jesse Blue functions as the evil counterpart to the Star Sheriffs, a recurring personal antagonist who understands their methods from the inside. His role often involves setting elaborate traps, leading attacks on Cavalry Command, and developing new, powerful weapons against the heroes. His primary and most destructive relationship is with April Eagle, to whom he remains obsessively attached. He alternately tries to win her, manipulate her, and, when thwarted, expresses a desire to destroy her. He also cultivates a deep-seated grudge against Saber Rider, seeing him as a rival for April's affections and the embodiment of the organization that rejected him. He also forms manipulative relationships with other characters, such as the young woman Trista, whom he exploits for his own purposes, showing his complete lack of empathy.

Jesse Blue undergoes a significant development throughout the series, typically described in three escalating phases. He begins as the arrogant but promising Cadet Blue, transforms into the cold and loyal Phantom Commander, and finally evolves into the delusional Phantom Ruler who believes he can take over the entire Outrider dimension. This trajectory shows a progressive loss of restraint and sanity as his quest for power consumes him. In terms of abilities, Jesse is a brilliant and ruthless tactician whose plans are notoriously difficult to counter. He pilots a unique personal spacecraft called the Badlander, which can transform into a high-tech combat suit armed with heavy weaponry and a laser lasso. At the climax of the series, he also commands a powerful, custom Renegade unit that is capable of challenging the Star Sheriffs' giant robot, Ramrod.