is an anime series that focuses on seventeen-year-old Kyosuke Date who was killed by his mother Mio Date, and afterward gained the ability to turn into an incredibly powerful winged mutant known as "The SoulTaker" and that he has a long-lost twin sister named Runa, and that his past is all a lie. The series was directed by Akiyuki Shinbo and was Tatsunoko's first anime to utilize digital animation as well as the first anime to be broadcast on high-definition television, and features a five-episode spinoff OVA miniseries featuring the character Komugi titled Nurse Witch Komugi, albeit Shinbo did not return to direct the OVAs. Plot After being stabbed in the chest by his mother, Kyosuke Date is resurrected to find out he has a twin sister named Runa, and the ability to transform into the amazingly strong, powerful and dangerous superhuman mutant known as the SoulTaker. As he seeks out his twin sister, he is being pursued by the strange mutant doctors and nurses of the hospital, led by his own father, Richard Vincent, as well as the evil Kirihara corporation, led by Yui Kirihara, who are also tracking down Runa for their own malevolent purposes. Assisting him along the way are the mysterious Shiro Mibu and the nurse mutant girl Komugi Nakahara, who betrayed the Hospital out of strong romantic love for Kyosuke. Characters The main character. He is a mutant boy who is kind-hearted, generous, selfless, serious and determined. After being stabbed in the heart by his adoptive mother, Mio, he returns to life to find his long-lost twin sister, Runa. He has the mutant ability to transform into the tremendously strong and dangerous superhuman mutant known as "The SoulTaker". He can also communicate and resonate telepathically with Runa and the fragments of her spirit/soul called flickers. In Nurse Witch Komugi, he appears as a seventeen-year-old star who helps his long-lost twin sister Runa who has mysteriously been released from his body and retains her five-year-old look. Kyosuke's adoptive mother who had stabbed him in the heart in order to awaken his dormant abilities as a mutant, as the only way to have done so was to betray a loved one. She was a good friend of Tsubaki Tokisaka, who entrusted Mio to raise Tsubaki's son, as Tsubaki did want to involve him with her family's dark ambitions regarding her twin daughter and his own twin sister,