Dragon Boy, whose real name is Liang Long, is a central character introduced in the ninth story arc of the series, holding the rank of the third most powerful hero. His entire being is forged from a childhood defined by extreme abuse and a deep-seated hatred for the world he seeks to tear down. From a young age, Dragon Boy was subjected to brutal physical conditioning by his parents, who used extreme methods to stimulate his body, such as forcing him to swim beneath the frozen surface of a lake where he had to break through the ice to survive. This traumatic upbringing instilled in him a profound loathing for weakness, which he projects onto the world by labeling others as useless trash that needs to be eliminated.

Dragon Boy's personality is that of a ruthless and arrogant provocateur. He is cold, calculating, and takes clear pleasure in psychologically tormenting his opponents before physically destroying them. His outward aggression is not just a product of his rage but a calculated strategy. He actively seeks out conflict, deliberately provoking enemies to attack him first, as his unique power set requires him to be hit in order to grow stronger. He views the majority of humanity and even his fellow top-tier heroes as disposable annoyances, showing little respect for rivals like the Johnnies or Loli, whom he considers the weakest and easiest to remove from the rankings.

Dragon Boy's primary motivation is to monopolize the Trust System, the source of all superpowers in this world, and ascend to become a god-like being. He idolizes a figure known as Zero, a previous entity of immense power, and aspires to reach that same level of destructive divinity. This goal is nurtured by his mentor, Yan Mo, the master of the hero agency Mighty Glory. Yan Mo sees Dragon Boy as the perfect vessel, a candidate he can cultivate into a god, and has worked behind the scenes for a long time to elevate his ranking and guide his development. Dragon Boy acts as the primary instrument of Yan Mo's will, tasked with eliminating other heroes to consolidate power.

In the story, his role is that of a major antagonist and a ruthless competitor in the cutthroat world of hero rankings. His most significant action is his orchestrated attack on the veteran hero Smile. To steal Smile's top ten position, Dragon Boy viciously taunts him about his missing daughter, goading the older hero into a fight. When another hero, Nice, tries to intervene by injecting Dragon Boy with a substance called Fear, it backfires. Due to his unique resilience, Dragon Boy is able to resist the Fear and expel it, infecting Smile instead and transforming him into a rampaging monster. Dragon Boy then publicly defeats the corrupted Smile in a display of excessive violence that, despite sparking controversy, propels him to the third rank.

His key relationships are defined by utility and conflict. He is fiercely loyal to Yan Mo, who serves as both his handler and surrogate father figure in their shared mission. He is a rival to Nice, whose perfection he despises, and he holds a particular contempt for his former colleague Ghostblade, viewing his escape from Yan Mo’s control as a failure. His ultimate target is Hero X, the number one ranked hero. When X finally intervenes to stop his rampage, Dragon Boy is thrilled at the chance to claim the top spot, but he is instantly and effortlessly defeated, unable to comprehend or resist X's reality-warping power.

Dragon Boy undergoes a notable, albeit cyclical, form of development. His transformation is both physical and psychological. As he absorbs more damage, he can enter a more powerful state where his skin turns black, his tattoos glow, and his features sharpen. However, his arc reveals a tragic irony. Despite his quest to become a god and destroy all he deems worthless, he is ultimately treated as trash himself. Hero X defeats him not with violence, but by crumpling his three-dimensional form into a two-dimensional ball of paper and throwing him into a river, mirroring his childhood trauma of being trapped under ice and discarded as useless by his own mother.

Dragon Boy possesses formidable abilities all centered on the concept of retribution. His core superpower is damage absorption and reflection. He cannot gain strength through self-harm; he must absorb kinetic energy and external damage. The more he is beaten, the stronger he becomes, and he can ultimately release all that stored energy in a devastating one-hit-kill attack called Unload, though this move has a notoriously long wind-up time. He is also highly resistant to psychological manipulation and external corruption, able to reject Fear Value by literally spitting it out of his system. As a close-combat brawler, he couples this power with superhuman physicality and a talent for using taunts to manipulate his enemies into playing directly into his hands.