Daryun is a central figure in the anime "The Heroic Legend of Arslan: Dust Storm Dance," serving as the most trusted and formidable protector of the young prince Arslan. Known by the epithet "the Fighter among Fighters" or "Warrior among Warriors," he is a paragon of martial skill and unwavering loyalty. Physically, he is a striking figure, a tanned and handsome man with sharp features, narrow eyes, and thick eyebrows. He keeps his long black hair tied back in a low ponytail. His most iconic visual trait is his black armor, with the lining of his cloak being a deep, sunset red, which gives him the foreboding appearance of a "Knight in Black." He rides into battle on his trusted warhorse, Shabrang.

Daryun's personality is defined by a calm, serious, and stern demeanor. As a veteran warrior, he is a man of few but powerful words, and he approaches every situation with a level-headed pragmatism. Despite his formidable and sometimes intimidating presence, his core identity is that of a knight whose absolute allegiance is his defining virtue. This loyalty is not blind duty; it is a deeply considered and personal conviction. He had originally sworn his sword to King Andragoras III, but it is his service to Andragoras’s son, Arslan, that becomes his life's central purpose. He was assigned to protect the young prince by his own uncle, the Supreme General Vahriz, who sensed the dangers that lay ahead. However, as Daryun journeys with Arslan and witnesses the prince's inherent kindness, intelligence, and vision for a just kingdom free of slavery, his sense of duty transforms into a powerful personal devotion. He becomes deeply drawn to Arslan’s qualities as a potential king, choosing to follow him not merely because he was ordered to, but because he genuinely believes in the prince’s cause.

His role in the story is that of Arslan’s shield and sword. After the devastating Battle of Atropatene, where the Parsian army is decimated by a betrayal from within, Daryun is the one who rescues the fleeing prince, saving his life from the traitorous general Kharlan. From that moment forward, he becomes the pillar of strength for Arslan’s small but growing resistance group. While the group's strategic mind is the brilliant Narsus, Daryun is its indomitable martial arm. He is the frontline commander who leads the charge, inspires the troops, and personally confronts the deadliest of enemies to ensure Arslan’s safety. He is fiercely protective of the prince, constantly vigilant and ready to sacrifice his own life without hesitation.

Daryun’s most significant relationship is with Arslan, evolving from a guardian assigned to a prince to a loyal comrade who truly respects the man Arslan is becoming. This bond is one of deep, unspoken trust, where Arslan relies on Daryun’s strength and Daryun draws inspiration from Arslan’s ideals. His other key relationship is with the strategist Narsus. They are described as being close friends from childhood, having known each other since the age of seven. Their dynamic is a classic pairing of brawn and brain, but it is built on profound mutual respect. They share a home and fight side-by-side, often engaging in a sharp but affectionate banter. Daryun, the pragmatic and blunt warrior, is the perfect foil to Narsus, the elegant and sometimes sarcastic artist and tactician. In one notable instance, Daryun even uses Narsus’s reputation to intimidate a prisoner, claiming that the strategist can paint portraits that suck out a person's life force, a bluff that showcases his practicality and sense of humor.

Throughout the events of "Dust Storm Dance," Daryun’s character demonstrates a subtle but important development. While his loyalty and martial prowess are constants, he becomes more than just a protector. He begins to serve as a key advisor to Arslan, lending his weight to the prince's decisions and helping to lead their small band through political and military crises, such as their mission to liberate the port city of Gilan from pirates. He continues to be the unwavering force that allows Arslan’s more idealistic nature to have the space to grow into true leadership.

In terms of abilities, Daryun is a peerless warrior, which is why he is celebrated as a "Fighter among Fighters." He is an extremely skilled horseman, a crucial trait for a cavalry commander, and is proficient with nearly every form of weaponry. While he is a deadly archer and a master of the sword, his most notable skill is with a spear or lance. In the manga and novel series, he is also known for using a Chinese "ji," a type of halberd, showcasing his versatile expertise in combat. Beyond his physical strength, he possesses a sharp and tactical mind, often able to perceive flaws in a battle plan or deception. His intelligence is a primary reason why someone like the traitor Kharlan considered him a major threat. As a high-ranking officer known as a Marzban, his strategic insight and combat leadership are as invaluable to Arslan's cause as his prowess with a blade.