As a member of King Gorneesh's tribe hailing from Endor's Forest Moon, a particular Dulok set himself apart from the other members of his species with a distinctive yellow diamond marking displayed on his chest. Aside from this, he was a typical green-furred Dulok, though he occasionally sported a white cloth band around his left arm and another on his right knee. By the year 3 ABY, this Dulok had risen to the position of warrior within his tribe, enabling his involvement in missions assigned by King Gorneesh. These missions were primarily directed at the Ewoks residing in Bright Tree Village, a settlement located near the Dulok Swamp. In one instance, this diamond-marked Dulok found himself riding the Ewok battle wagon after his tribe had successfully stolen it from the Ewoks. However, this Dulok fighter was ejected from the vehicle during an assault on the Ewoks' Soul Trees, which held immense religious significance for the Duloks' adversaries. On another occasion, this Dulok joined a hunting party, only to suffer defeat at the hands of the renegade Ewok Asha and her comrades.
As a member of the Dulok tribe under the leadership of King Gorneesh, one specific male Dulok stood out from the others due to a yellow diamond-shaped mark on the fur of his chest. Like the rest of the male Duloks inhabiting the Dulok Swamp on Endor's Forest Moon, this Dulok with the diamond marking took part in various tasks delegated to him by the King. In the year 3 ABY, he accompanied several members of his tribe as they boarded a siege weapon, a battle wagon, which they had previously seized from its Ewok creators. With the intention to destroy the Ewoks' Soul Trees, which were natural trees holding deep spiritual meaning for the Ewoks, the Dulok positioned himself on the top deck of the contraption as his fellow Duloks steered it toward the forest surrounding the Ewoks' home settlement, Bright Tree Village. Before the battle wagon could reach its destination, however, two Ewok children—Malani and Wicket W. Warrick—climbed aboard the vehicle and attempted to thwart the Dulok attack. When the Ewoks reached the upper level, Gorneesh commanded the Duloks present to stop them. After another Dulok charged at the Ewoks and fell to the forest floor, the diamond-marked Dulok followed suit and accidentally tumbled off the wagon. Ultimately, the Ewoks managed to disable the device, saving their Soul Trees and forcing the Duloks to retreat back to their swamps.
During that winter, the Dulok bearing the diamond marking participated in a hunting expedition alongside three other Duloks—one Dulok marked with an X, another marked with an O, and one without any markings—as they pursued a horned, bipedal creature known as a maramu. Wielding a club in his hand, the Dulok with the diamond marking on his chest assisted in driving the maramu towards the edge of a cliff, only to be pushed back down the slope when the X-marked Dulok stumbled and fell backward into his comrades. After scrambling back up the slope, they managed to capture the creature with a net, but a fierce howl echoed from the nearby trees. Suddenly, a red-furred figure—referred to by the Duloks as "the Red Ghost," but actually a lone Ewok named Asha—appeared and ensnared one of the Duloks with a lasso, pulling him into the tree and dropping him onto his fellow hunters. Startled by the apparition, the diamond-marked Dulok and his companions fled in terror.
Subsequently, he accompanied King Gorneesh and the shaman Umwak, along with his companions with the X and O markings, the unmarked Dulok, and another member of the tribe with arrows marked on his chest, as they chased prey through the winter snows. The group managed to capture several small creatures, which they confined in boxes, as well as another maramu, which the diamond-marked Dulok helped restrain with ropes. As if out of thin air, the Red Ghost materialized and casually strolled into the midst of the Duloks to release the maramu and other creatures from their traps. On Gorneesh's orders, the Duloks with the X, O, and diamond markings captured the Ewok with lassos, but she seized their ropes, spun the Duloks in a circle, and hurled them into a snowbank. The King ordered another attack, but the Ewok sidestepped, causing the Duloks to collide with one another. She then roped a Dulok with arrows marked on him and flung him onto the pile of downed foes. The hunting party fled the scene and stumbled upon a hollow log, which the diamond-marked Dulok straddled with his fellows as they slid down the snowy slope and off the side of a cliff. A body of water cushioned their fall, but the King vowed never to hunt in the forest again, fearing another encounter with the Red Ghost.
The diamond-marked Dulok was both a warrior and a hunter for his tribe. He was skilled in the use of clubs, lassos, and spears. He demonstrated ambidexterity, wielding weapons in either his left or right hand. He was particularly proficient with the lasso, capable of capturing a fleeing maramu from a considerable distance. Nevertheless, he possessed a certain clumsiness; on one occasion, he and his comrades collided with each other while pursuing an enemy. While riding the Ewok battle wagon, his zealous attack on his Ewok adversaries led him to overestimate his own momentum, resulting in his fall to the forest floor.
The diamond-marked Dulok displayed unwavering loyalty to King Gorneesh, carrying out the ruler's commands without hesitation. Like many of his fellow Duloks, he derived pleasure from inflicting pain and suffering on others. When his hunting party captured a female Ewok, the diamond-marked Dulok joined in the laughter at the Ewok's predicament.
A yellow diamond shape on his torso distinguished the Dulok from the rest of his tribe. Additionally, he wore a strip of white cloth around his left upper arm and another around his right knee. Otherwise, he was virtually indistinguishable from the other members of his tribe, possessing green fur, gray skin, brown eyebrows, pink eyes, snarling teeth, and a lanky frame that measured approximately 1.35 meters in height.
The Dulok character with the diamond shape on his torso was introduced in the Ewoks animated television series with the November 9, 1985, broadcast of "Wicket's Wagon," an episode penned by Paul Dini and directed by Raymond Jafelice. The Dulok subsequently appeared in the November 30, 1985, episode, "Asha," also created by Dini and Jafelice. The DVD feature film Tales from the Endor Woods, initially released in 2004, includes edited versions of both episodes. Adaptations of the stories and supplemental materials indirectly mention the Dulok by referencing the hunting parties and war bands in which he participated.