Jesse Blue is a significant character in the animated series Saber Rider and the Star Sheriffs, primarily serving as a human antagonist and a tragic figure whose actions are driven by personal obsession. In the American adaptation of the series, the character of Jesse Blue was notably reworked from his original Japanese counterpart, Perios, who was an alien. In this version, he is presented as a human who becomes a traitor to his own kind.

Jesse Blue is introduced as a promising but deeply flawed cadet at Cavalry Command, the training ground for the Star Sheriffs. He is young, headstrong, and possesses a dark, brooding charisma. His most defining trait is an intense and possessive infatuation with April Eagle, the team's tech expert. This obsession is the primary engine for his actions. During a banquet at Cavalry Command, he publicly declares his love for April, but she rejects him. Humiliated and consumed by jealousy, he blames Saber Rider, the team's leader, for his embarrassment and is subsequently expelled from the academy.

Following his fall from grace, Jesse's motivations become singularly focused on revenge against the Star Sheriffs. He initially allies himself with local desperadoes to attack Cavalry Command, a scheme that backfires when he learns his actions have endangered April. Despite this moment of hesitation, his path toward darkness is sealed. He eventually makes a full turn to villainy by siding with the Outriders, the primary alien menace of the series. Jesse becomes a deceptive disciple, working directly for the main antagonist, Nemesis, and proving to be a cunning and manipulative adversary. Unlike the intangible Vapor Beings that make up the Outriders' ranks, Jesse is all too human, making his betrayal feel more personal and raw.

Jesse's relationships are central to his role in the story. His dynamic with April Eagle is that of a stalker with a crush, a disturbing fixation that leads him to attempt to force himself on her in one episode, showcasing a volatile and dangerous side to his personality. His rivalry with Saber Rider is born of this jealousy; he views the noble and composed leader as the obstacle to his desires. He also forms manipulative bonds with others, such as a young girl named Trista, whom he uses for his own ends while working on an Outrider construction project. These relationships paint a picture of a young man who craves affection and power but seeks them through coercion and destruction.

In terms of his role, Jesse serves as a recurring human villain, providing a contrast to the alien Outriders. He is a grim mirror to the Star Sheriffs, a talented individual who squandered his potential due to his inability to control his emotions. He goes on to transport captured allies like Commander Eagle and helps the Outriders in their efforts to enslave frontier towns. Physically, he is depicted as a capable fighter, and his cunning makes him a persistent threat. His most notable ability, however, is his talent for manipulation and sowing discord, which he leverages to get close to his enemies and further the Outriders' goals. His development throughout the series is a downward spiral from a jealous cadet to a full-fledged collaborator with humanity's greatest enemy, demonstrating how love turned to obsession can lead to utter ruin.