Jinto, whose full Abh name is Linn ssynec Rocr Ïarlucec Dreuc Haïder Ghintec and who signs his name as Jint Linn, is the male protagonist of the story. He was originally born as a human with the name Jinto Lin on the planet Martine in the Hyde Star System. His background is defined by a pivotal act of compliance: when the Abh Empire invaded his home system, his father, Rock Lin, who was the head of the government, chose to surrender rather than fight. In exchange for this peaceful submission, Rock Lin negotiated several concessions, the most important being that the new territorial lord of the Hyde system would be chosen from amongst the people of Martine. As the current leader, Rock Lin became the natural choice for this position, which elevated him and his son to the ranks of Abh nobility with the princely rank of Dreuc, equivalent to a Count. This decision, however, was interpreted as an act of treason by many of his own people.

Jinto's early life was marked by this complicated legacy. His mother, a mining engineer, died in an accident shortly after his birth, and he was largely raised by his father's secretary, Teal Clint. Growing up on Martine as the son of a figure many considered a traitor was a difficult experience that left a lasting mark on his personality. To be formally integrated into Abh society, he was sent to the planet Delktou to learn the Abh language, Baronh, and their culture. Approximately seven years later, he left Delktou to continue his education at a military college in the Abh capital, Lakfakalle. It is at the spaceport of Delktou that he first meets Lafiel, an Abh princess who serves as his escort to the patrol ship Gosroth, setting the entire story in motion.

In terms of personality, Jinto is often described as a shy, studious, and thoughtful individual who is somewhat uncomfortable with the grand and dangerous circumstances he finds himself in. He possesses a calm and relaxed demeanor, which can sometimes come across as an under-reaction to life-threatening situations, but this calmness also makes him a grounding presence. His core internal conflict revolves around his identity as a "lander" (a human born on a planet) who has been granted the legal status of an Abh noble. He struggles with questions of belonging, feeling like an outsider in Abh culture while also being sensitive to accusations of being a traitor to his fellow landers. Despite his reserved nature, he is not spineless. He is known to be a conciliator who prefers to avoid conflict, but he will stick up for others when necessary and can act with spontaneous improvisation when backed into a corner. He has a sharp and methodical mind, excelling as a planner who carefully considers details, a trait that earns the respect of notable figures like the demanding Admiral Spaurh.

His motivations are deeply tied to his sense of duty and his relationships. As a noble and an officer in the Abh Star Forces, he serves the empire that granted him his status, even as he holds complicated feelings about it. More powerfully, he is driven by an overwhelming need to be by the side of Lafiel. Their bond is the emotional anchor of the series; he frequently acts as her voice of reason, tempering her impulsive and glory-seeking tendencies, while she helps him overcome his self-doubt. Their relationship is strained by the tragic knowledge of their differing lifespans—as a genetically-modified Abh, Lafiel will live for centuries, while Jinto, a normal human, will grow old and die. This inevitable future is a source of ongoing internal struggle for him.

In the story, Jinto serves as a crucial viewpoint character, providing a relatable perspective on the alien and aristocratic Abh Empire. After completing the academy, he is assigned to serve under Lafiel, who has become the captain of the attack ship Basroil. His official role aboard the ship is that of an administrative or supply officer, where he oversees supplies, staff, cargo, medical sections, and life support. This role highlights his non-combat strengths; he is a quartermaster and a manager rather than a warrior. He receives standard training with a laser pistol, as all Abh soldiers do, but his primary value to the crew lies in his organizational skills, his ability to navigate social situations, and his calm logic. He also owns a cat named Diaho, a gift from Lafiel, which serves as a small but meaningful link to his past and their relationship.

His key relationships define his development throughout the series. The most significant is, of course, with Lafiel. Their connection evolves from an awkward friendship between a princess and a reluctant noble into a deeply loyal and emotionally complex partnership that hints at romance without overt declarations. His relationship with his father, Rock Lin, is a formative shadow over his life; though his father secured his noble status, the perceived betrayal led to Rock Lin's eventual capture and execution by the Hyde parliament after the Four Nations Alliance retook the planet, leaving Jinto as the last surviving member of his family.

Notable abilities that Jinto possesses are not superhuman or combat-oriented. He is an ordinary human who must exercise regularly to maintain his health during long space voyages. His true strengths are intellectual and interpersonal. He is a methodical and logical thinker, adept at logistics, planning, and administration. He is also socially perceptive, a skill derived from his unique position between two cultures, which allows him to ease tense situations and keep a low profile in enemy territory. His character development is a gradual coming-of-age journey, moving from a self-conscious young man burdened by his father's choices to a more confident and dependable officer who accepts his role as an Abh noble while still cherishing his human origins. He learns to navigate the demands of the war and his place within it, finding a sense of home and purpose not in a planet or a culture, but in his unwavering loyalty to the people he serves beside, most of all Lafiel.