Kyosuke Date
A serious (well adjusted) and determined 17-year-old who suddenly finds himself killed – and awakes with the unwanted ability to transform into a monster – The SoulTaker! Unyielding in his search for the truth, no matter what the cost, he travels the land searching for his twin sister, Runa, and her Flickers.
SoulTaker
The form that Kyosuke takes when he is transformed. The name comes from a code name coined by the Kirihara Group. With his “Sonic Cross,” he is able to bend space and suspend his enemy in crucifix form in mid-air. His “Lightning Breaker,” is the ultimate weapon able to free the light of a soul and pulverize an enemy.
Komugi Nakahara
A 17-year-old mutant nurse of "The Hospital Organization." Her main role is in acquiring intelligence. She uses her hair to create scalpels and hypodermic needles. In the course of seeking out intelligence around Kyosuke, she begins to fall for his kindness.
Shiro Mibu
Enemy? Ally? All Kyosuke knows is Shiro suddenly appeared and began to follow him on his journey. Shiro also seems to know quite a lot about Kyosuke’s secret. A hardboiled character that mainly uses a knife or a steel baseball bat as his preferred weapons, he is aggressive and adept at various marital arts.
Maya Masaki
The mysterious young nurse who exhumed Kyosuke from a grave. She is one of the few who is aware that she is a Flicker, and shares Kyosuke’s ability to resonate. She has a distinct crush on Kyosuke.
Psycho Dr. Narugami
A psychotherapist from the Hospital who fancies himself a singer. Able to emit super-sonic waves from his voice, and generate nightmarish hallucinations. He can also mutate himself to bat-like form.
Sayaka Tachibana
Traumatized by her boyfriend's death, this Flicker is easy prey for Narugami. Saved by Komugi, who takes on the appearance of her best friend, Yuko, she is ultimately taken captive by the Bandaged Man.
The SoulCrusher
Powerful leader of the Hospital Organization, Richard Vincent's mutated form is known as the SoulCrusher. He possesses a similar weapon to Kyosuke's Lightning Breaker - the Lightning Crusher. During their fight, he reveals clues to SoulTaker's origins.
Kasumi Shiina
Kyosuke rescues this Flicker from the Kirihara Group facility, but she ends up getting abducted by the Bandage Man during he battle between SoulTaker and SoulCrusher.
Megumi Akiba
A resentful Flicker who bides her time with a Hospital assassin - Zabo. Blaming her mother and Kyosuke for her unjust fate, she attempts to kill Kyosuke. As Zabo's castle self-destructs, she is rescued by the mysterious Bandaged Man.
Zabo
Once known as The Knight of the Morgue, this Hospital assassin is near death and has forged an alliance with a Flicker, Megumi, to provide him with the opportunity to battle with the greatest mutant warrior ever created, the SoulTaker. He lives in a stratospheric castle maintained by his brain waves.
Tsubaki Tokisaka (Flicker)
Posessing the appearance, memories and desires of Kyosuke's biological mother, Tsubaki strips Kyosuke of his ability to resonate with the Flickers and Runa to free him from his fate. He finds out she is not his birth mother, but rather another Flicker - this time, Runa's idea of the perfect mother. Tsubaki is killed in a sniper battle with the Kirihara Group, and her body gets used to create the SoulAnubis.
Umon and Sanae
Richard's loyal assistants. Both are mutants and the last survivors of the Hospital who escaped from the SoulAnubis' fatal attack. They follow Richard until his final fate.
SoulAnubis
Created from the Flickers that the Bandaged Man kidnapped. She possesses abilities beyond that of the SoulTaker, and takes on the role of "Runa Searcher." Her main weapons are light beams and shock waves that emanate from both hands. Her right arm can also take the form of a sword. Her actions and thoughts were programmed by the Kirihara Group, but as the battle progresses she begins creating her own agendas.
Zombie Nurses
Mutant nurses of the Hospital. They battle as a group, using acid syringes and clinical thermometer bombs as weapons.
