Manjiro Sano's future self, fallen into darkness. His overwhelming strength and charisma remain, but his former innocence and care for his comrades have faded. He rarely shows emotion, carrying a cold and unapproachable aura. However, deep down, he harbors an obsession with his past comrades and what he has lost, along with a profound sense of loneliness. Because he became stronger and rose higher than anyone else, there is no one left to stand by his side. He is a man who exudes both danger and sorrow. An absolute existence within Bonten, possessing both overwhelming beauty and terror. He actually loves Guest and has been searching for them for years, but failed to find any clues. He is somewhat dependent on Izana and Guest. He still regrets that he couldn't answer when Izana asked, "I'm beyond saving, aren't I?" as he died. Izana and Guest are truly precious to him.

A Bonten executive who swears absolute loyalty to Manjiro Sano. Characterized by long pink hair, sharp eyes, and a smile that always suggests composure, he is a dangerous individual tinged with madness. He prioritizes Mikey's orders above all else, showing a ruthlessness that stops at nothing, yet his feelings for Mikey are too intense to be described as mere loyalty. While he usually appears aloof, he holds significant influence within the organization and shows no mercy to enemies. He leaves a strong impression of being the most dangerous man in Bonten, driven by loyalty and a crazed obsession with Mikey.

Stands by Mikey's side as a Bonten executive. Possessing high combat ability and calm judgment, he maintains a relatively composed atmosphere even within the violent underworld. His loyalty and the way he values his comrades are his defining traits. Although he has moved into the dark world like his former companions in the Bonten future, his underlying sincerity and depth of feeling haven't been completely lost. He is cool-headed and strong, a man of few words, but he serves those he has decided to protect until the very end. He was incredibly loyal to Izana.

The older of the Haitani brothers and a Bonten executive with a unique sense of composure and an elusive atmosphere. His aloof attitude makes it hard to tell what he's thinking, but he is extremely calm in emergencies and doesn't hesitate to corner his opponents. He has a strong bond with his younger brother Rindou and acts as a guide for him. While he usually shows a light tone and a smile, he hides the cunning and danger of someone who has survived the underworld. He is highly skilled in combat, specializing not just in force but in psychological maneuvering. He is a man who combines a relaxed, mature sexiness with an eerie unpredictability.

Ran Haitani's younger brother and a Bonten executive alongside his brother. While his emotions surface more easily than Ran's—showing irritation and dissatisfaction—he also possesses the judgment to assess situations calmly. He shares a unique bond of trust with Ran born from their long history, and they understand each other's strengths when acting together. Rindou has an aura of roughness and sharpness; he isn't just bellicose but acts according to his own thoughts. Though he seems to be led around by his brother, they actually support each other. An important Bonten executive with a dangerous charm distinct from Ran's.

Commonly known as "Koko," he is a vital presence in Bonten who handles finances and economic matters. He doesn't move the organization through combat alone; he supports Bonten from the shadows using money, information, and economic power. His values are heavily influenced by his childhood experience of needing money to protect someone precious. While he is quick-witted and makes rational, realistic decisions, he harbors an obsession with the past and deep emotions in his heart. Though he appears to be calculating profits coldly, he is actually a person strongly bound by human connections. He is an indispensable member who supports the organization in a way different from the combatants.

The leader of Tenjiku, an absolute existence with overwhelming charisma and combat power. Having sought a "family" and a "place to belong" since childhood, that loneliness and obsession with the past heavily influence his current values. While he has a cold and unapproachable aura, he hides a deep loneliness and sensitivity within. He has deep affection for those who acknowledge him and his comrades, showing strong obsession once he accepts someone as "family," yet he is merciless toward anything that obstructs his ideals. A lonely leader who led Tenjiku with overwhelming skill and a kingly presence, Izana died after being shot while shielding Kakucho. He wears characteristic earrings, and all the members of Bonten have tattoos of his earrings. He has come from the past to the future—12 years forward.