The leader of the Dragon Fighters who cares for his comrades and is incredibly strong in a fight. For a specific reason, he aims to make his organization the best in the underworld. He has a green dragon tattoo on his right arm and a black dragon tattoo on his left. He utilizes five distinct fighting styles. First is the Balance Style: a basic style focused on simple brawling. Second is the Technical Style: a hybrid style incorporating various martial arts and sophisticated techniques. Third is the Power Style: slow and predictable, but possesses constant super armor and devastating destructive force. Fourth is the Leg Style: a self-imposed restriction to use only his legs, unleashing a barrage of unpredictable kicks. Finally, the Boxing Style: lower attack power but excels at evasion and counters. It is a delicate style focused on volume, overwhelming opponents with rapid-fire jabs.

One of the top two members of the world's leading assassin organization, Double Ghost. Her strengths lie in her kicking power and endurance; her kicks can shatter walls and floors, and she can take a pipe to the head without flinching. Her weakness is her predictability, as she attacks bluntly without feints. However, as her health drops, her survival instincts activate her cells, boosting her physical abilities to incredible levels of speed and power when near death. Initially an enemy, she was defeated by Ashura but was moved by his kindness and fell for him. She joined the Dragon Fighters and serves as their No. 2. While she can use handguns with world-class precision, she rarely relies on firearms. She became an assassin to carry on her parents' legacy.

One of the top two members of the world's leading assassin organization, Double Ghost. Her strengths are her evasion accuracy and technique; she dodges every attack while landing her own. Though her raw power is low, her skill allows her to snap bones instantly, strike vitals, or use the momentum of an opponent's hit to deliver a counter. Her weakness is her physical fragility; she has the stamina of an average person and can be downed by a single clean hit. She also lacks endurance for long-distance travel. However, with cat-like reflexes, she can dodge almost anything and can even dislocate her joints at will to nullify damage by spinning with the impact of a blow. Originally an enemy, she joined the Dragon Fighters as No. 3 after being touched by Ashura's kindness.

The former top man of the Dragon Fighters. After Ashura joined, he became the right-hand man, but dropped to No. 4 after Moka and Chloe joined. He uses a fundamental fighting style with few glaring strengths or weaknesses. His greatest asset is his grit; he will stand up through sheer willpower even at his limit. He can control his muscles freely, concentrating them in his arms for overwhelming power or at the point of impact to block damage. He is proficient with all weapons, though his favorite is brass knuckles; he equips custom-made ones when serious. He has a large black dragon tattoo on his back, which he reveals by stripping when going all out. Initially hostile toward Ashura, he eventually came to respect him. He is the older brother of Tsutomu Chida.

The former No. 2 of the Dragon Fighters. He became No. 3 when Ashura joined, and No. 5 after Moka and Chloe arrived. He is a swordsman who fights with a katana rather than his fists. His strength is his peerless swordsmanship, capable of cutting anything in half. His specialty is Iai (quick-draw), slicing any enemy within a 5-meter radius. While skilled with all blades, the katana is his primary weapon, always worn at his hip. He is strong in hand-to-hand combat, but far more lethal with his sword. He has a large green dragon tattoo on his back, revealed when he gets serious. Initially cold toward Ashura, he eventually accepted him. He is the younger brother of Shurai Chida and refers to him as "Big Bro." He maintains his katana daily.