L'Arc Berg Sickle, the Scythe Hero and wielder of a Vassal Weapon, rules a small kingdom in a world threatened by interdimensional Waves. Tasked with preventing his realm’s collapse, he balances governance with a free-spirited, adventurous leadership style, strategically uniting skilled allies despite his reluctance for royal formality. His kingdom thrives under his unconventional yet effective reign. Muscular and vibrant, L'Arc sports crimson spiked hair, sharp red eyes, and a scythe tattoo on his left arm. His approachable, brotherly charm masks the weight of kingship, inherited after his father’s death. Though he dismisses traditional authority, his relaxed demeanor belies a shrewd mind that maintains his land’s stability. Playful and irreverent, L'Arc dubs younger companions “Kiddo” and revels in childlike enthusiasm during escapades. He upholds strict moral codes, refusing to harm innocents, and instinctively gauges others’ intentions. Self-deprecatingly calling himself a “lovable idiot,” he shifts from humor to intensity in battle, fiercely guarding allies. Flaws like cheeky mischief—such as sneaking glances at women—add relatability to his otherwise noble persona. Mastering close-quarters combat, L'Arc wields his Vassal Scythe with wind-imbued strikes, synergizing with Therese Alexanderite’s elemental magic. While a battlefield tactician, he fumbles in crafting, failing to forge trinkets to woo Therese. His strategic brilliance unites factions against shared foes, first clashing with Naofumi Iwatani to protect his world, then allying with him against greater threats like Kyo Ethnina. Initially an antagonist, L'Arc invades Naofumi’s world to kill Legendary Heroes, believing their demise would save his own realm. Though conflicted by Naofumi’s integrity, duty drives their rivalry until Naofumi rescues Kizuna, prompting L'Arc’s shift to ally. Bonds deepen with Therese, whose affections he openly reciprocates, and he forges an unlikely friendship with Motoyasu Kitamura through shared roguish humor. Once a rebellious youth likened to legendary troublemakers, L'Arc matured into a monarch who retains his mischievous spark. Juggling sovereignty with wanderlust, he embodies the tension between duty and desire, evolving from a rival burdened by moral compromises to a pivotal leader in interdimensional battles, his journey marked by loyalty, growth, and resilience.