TV-Series
Description
Nereis, whose full name is Bebaus Alon Nerem Nereis, is a supporting character in the anime series Banner of the Stars, the sequel to Crest of the Stars. He is a male Abh, the genetically engineered space-dwelling human race that rules the Humankind Empire of Abh, and is visually distinguished by his blue hair and blue eyes. He holds the rank of admiral within the Star Forces of the Abh Empire.

Nereis belongs to the Bebaus family, a noble house within the Abh imperial hierarchy that is noted throughout the series for its members' unconventional and erratic behavior. This familial trait is frequently described by other characters as a kind of spectacular insanity, suggesting that Nereis and his kin are brilliant but unpredictable, often acting on instincts or whims that others might consider reckless or difficult to anticipate. Nereis shares his name and appearance with his brother, Nefee Bebaus, making the two a pair of identical twin admirals within the Abh fleet. This twin relationship is a defining aspect of his identity; the Bebaus brothers are often spoken of together, and their joint presence in the fleet is a source of both unease and strategic curiosity among their peers.

In the story, Nereis serves as a high-ranking officer during the ongoing war between the Abh Empire and the Four Nations Alliance of Humankind. His most notable operational role occurs in Banner of the Stars, where he is depicted as the commander of the hunter fleet, tasked with executing the campaign to reclaim lost imperial territory. It is under his authority that the main characters, Lafiel Abriel and Jinto Linn, are assigned to serve as the lord and deputy lord of the conquered planet Lobnas II, a mission that places them in the middle of a volatile prison colony. This decision reflects Nereis's capricious nature as a commander, as the assignment seems to stem from a casual personal whim rather than strategic necessity. His approach to leadership is characterized by a detached and somewhat theatrical demeanor, which contrasts with the more rigid and disciplined styles of other Abh officers.

Nereis's key relationships within the narrative are defined primarily through his family and his command. His twin brother Nefee is his closest counterpart, and the two operate as a matched set within the fleet, their synchronized presence reinforcing the Bebaus family's fearsome and eccentric reputation. In terms of the main cast, Nereis stands as a remote superior to Lafiel and Jinto, exerting influence over their fates from a distance through the chain of command. His interactions with them are minimal and indirect, limited to the orders that send them into difficult situations, which underscores the vast power differential between a high admiral and junior officers. He also commands the respect and wariness of other senior officers such as Admiral Atosuryua, who must navigate the unpredictable decisions of her Bebaus superiors.

Character development for Nereis is minimal within the screen time of the anime; he remains a static figure whose personality and role are established through his actions and the reputation of his house rather than through a personal arc. He is not a central character whose beliefs or motivations evolve over the course of the series. Instead, his function is to serve as a narrative device that demonstrates the idiosyncrasies and internal dynamics of the Abh imperial military, particularly the way noble lineage and family quirks can influence the course of a war.

In terms of notable abilities, Nereis is a capable fleet admiral with the tactical and strategic knowledge required to command large-scale space operations in the Abh fleet. Beyond conventional military skill, his primary distinguishing attribute is his mindset, shaped by the Bebaus family legacy of unpredictability. This makes him difficult for enemies to anticipate and challenging for allies to work with, but it also grants him a certain freedom to make unorthodox decisions. He is portrayed as calm and confident in his authority, rarely showing concern for the political or personal fallout of his orders. While he does not engage in direct combat, his ability to command and his family name make him a figure of considerable influence within the empire's military hierarchy.
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