Kaiser Lidfard is a central character in the anime Rage of Bahamut: Virgin Soul, whose journey is defined by a deep-seated sense of honor and a tireless quest to restore his family's name. He hails from a once-prestigious noble family of knights, but his life was shattered when his father was publicly executed for failing to guard a royal tribute. This event led to his family being stripped of its status and his mother’s subsequent suicide. Blaming the bounty hunter Favaro Leone for this ruin, Kaiser became a bounty hunter himself, consumed by vengeance. Over the course of the first series, he discovered that the true culprit was the demon Azazel, reconciling with Favaro and playing a key role in the battle against the legendary dragon Bahamut. By the time of Virgin Soul, set ten years later, Kaiser has successfully regained his noble title and honor, now serving as the devoted captain of the Orleans Knights under the rule of the human king, Charioce XVII.

Kaiser is a man of unwavering righteousness and strong moral principles, always striving to follow his own strict code of justice. He is deeply compassionate and empathetic, with a particular reverence for family bonds, a value forged by the tragic loss of his own family. In Virgin Soul, his defining characteristic is his fierce and almost absolute loyalty to King Charioce XVII, whom he believes is the only one capable of maintaining peace in the world. This loyalty is so profound that Kaiser is willing to sacrifice his life for the king, even when he personally disagrees with the king’s ruthless methods or when he himself is imprisoned and forced to fight as a gladiator. Despite his devotion, he is not blind to the king’s flaws; he is visibly uncomfortable with Charioce’s disregard for gods and demons and his use of the ancient weapon Dromos, which Kaiser considers a source of great trouble.

Throughout Virgin Soul, Kaiser’s role shifts from a loyal enforcer of the king’s will to a reluctant rebel. He is initially tasked with hunting down the Ragged Demon, a figure fighting against human oppression of demons. When he discovers the Ragged Demon is actually his old enemy Azazel, and witnesses the horrific torture of demons by humans, his faith in the righteousness of the king’s regime begins to waver, leading him to keep Azazel’s identity a secret. His internal conflict reaches a peak when he tries to stop a deadly confrontation between Azazel and the king, advocating for cooperation among the three races. For this act of defiance, he is stripped of his captaincy, arrested, and sent to a brutal labor camp. Even in captivity and eventual rebellion, Kaiser’s actions are never driven by a desire to overthrow the king entirely, but rather to correct what he sees as a dangerous path and restore a more honorable order. His key relationships are central to the story: his bond with Favaro evolves from vengeful hatred to a grudging, reliable partnership; his loyalty to King Charioce is the primary driver of his actions; and his interactions with the demon Azazel evolve from personal vengeance to a shared fight for survival.

Kaiser undergoes notable development across the series. The hot-headed and vengeful young man from the first season matures into a disciplined and principled knight captain, only to have his faith in authority tested to its breaking point. He demonstrates a capacity for moral compromise, choosing to protect Azazel, not out of friendship, but out of a sense of justice. His journey in Virgin Soul is one of realizing that peace and honor cannot simply be served to a single ruler, and that true justice sometimes requires standing against the very power he swore to protect. As a knight, Kaiser is a highly skilled swordsman and a capable strategist, commanding respect from his subordinates. He also possesses a notable physical resilience; having been transformed into a form of undead during the events of the first series, he is functionally a living corpse, a fact that contributes to his durability in combat.