Sakurai Yuki is a mysterious boy with a mysterious power. Right after he  was born, his mother left him near an orphanage, and he was later  found. Because of that event, Yuki strives for independence. He hates  being a burden to anyone near him, but at the same time, he is afraid of  being left alone. Moreover, ever since he can remember he had a strange  ability where when he touches others, he can feel their emotion. Unable  to control it, he often made insensitive blunders in the past. He later  meets with a mysterious yet beautiful man who saves his life, but  somehow he feels so nostalgic, like he's met him before. While death  threats and his ability increasing, a man who claimed to be his older  brother suddenly appears, so what will Yuki do when he learns the truth?
 CHARACTERS
Main
- Yuki Sakurai (Giou) (桜井(祗王)夕月, Sakurai (Giō)  Yuki?)  Voiced by: Hoshi Souichirou
 - The bearer of Kami no Hikari (神の光 (The Light of God)?)  or "God's light". The main protagonist, and a freshman in high school.  His mother left him at birth in order to protect him and he has been  living in Asahi Orphanage. Sometimes, when he touches someone, he's able  to read that person's emotions and see that person's past. It caused  him to suffer greatly, but he has unexpectedly grown into an unyielding  individual. He didn't have any recollection of his past life, but he  feels an odd nostalgia for Luka, and ends up relying on him. After he  leaves the orphanage, he's been referred to as "Giou Yuki." Yuki has  been reincarnated many times, however this is the first time he was born  male. It has been mentioned this may be a sign that things are coming  to an end or that he wants to forget the past.
 
- Zess (Luka Crosszeria) (ゼス(ルカ=クロスゼリア), Zesu (Ruka  Kurosuzeria)?)  Voiced by: Sakurai Takahiro
 - A young man with silver eyes and black hair who's been protecting  Yuki from the shadows ever since his birth 15 years ago. Despite being a  duras (a.k.a demon),  he's currently acting on Giou Clan side and is recognized as a traitor  by the other Duras. Although his real age is unknown, his appearance  looks like that of a college student. Normally reserved and indifferent,  his facial expressions softens when he's with Yuki. It was during the  last war that he changed side to the Giou Clan, as he apparently made a  binding "contract" with Yuki. Luka is a descendant of the "family of  sinners" (Zess) and a high-grade demon (Opasts). Luka battles with a  large black sword and can use powerful magic (and even summon a powerful  Salamander dragon).He was once the loyal dog for the demon king and  used to drink his blood, that's why he is stronger than any opasts and  it's possible that he is stronger than the demon king himself. But he  left his position as the loyal dog for the demon king after meeting Yuki  ( Yuki when he was still a woman ) so it was during the previous battle  he met Yuki and feel in love with her and so did she. The current Yuki  doesn't remember being lovers with Luka but every time he sees him his  heart goes pounding like crazy.
 - The manga suggests a bit of a darker history. Luka tells Yuki he was  considered a slave because he belonged to the "sinner" clan Crosszeria,  and so all the duras were intent on punishing the whole family and all  it's descendants. The demon king owned Luka and as a symbol of this, put  his own blood into Luka's brand that made it glow red and caused Luka  great pain during the process, and years later, Luka is still haunted by  the memory. Because it was a blood seal, if he should betray the demon  king, then he would die, but due to making a new contract with Yuki, the  previous one to the demon king was voided, which allowed him to live.
 
 Zweilt Guardian
- Tsukumo Murasame (叢雨九十九, Murasame  Tsukumo?)  Voiced by: Jun  Fukuyama
 - The bearer of Kami no Mimi, God's Ears. A high school boy who  appears to Yuki along with his sister at the start of the story. He is  one of the Zweilt Guardians and also part of the Giou Clan, making him  and his sister Yuki's distant relatives. His powers seem to be the  ability to speak with animals, sense people, and transform his ring into  a gun during a battle. For some reason he always has snacks with him.  He seems to be extremely close with his older sister Toko, whom he calls  Toko-chan and says he will always protect. He was severely injured by  Reiga in episode 10, but Yuki managed to heal him.
 
- Toko Murasame (叢雨十瑚, Murasame Tōko?)  Voiced by: Inoue Marina
 - Tsukumo's older sister, Yuki's relative and also a Zweilt guardian.  Her ring transforms in a huge sword. She attends the same high school as  her brother, where their closeness make all the girls jealous of her.  She is very fond of Yuki (whom she calls Yuki-chan), telling him that  "He is a person who is too kind for their own good" and asking him to  refer to her in a more close way (Touko-chan) instead of calling her  Touko-san.
 
- Hotsuma Renjou (蓮城焔椎真, Renjou  Hotsuma?)  Voiced by: Ono Daisuke
 - The bearer of Kami no Koe, God's Voice. Hotsuma is one of the Zweilt  guardians, and he can use fire as he likes. He is short tempered and  impulsive. He has been friends with Shuusei since childhood. At first he  dislikes Yuki, since he thinks that he has the same personality he had  in his previous life (which may indicate that he used to be on bad terms  with female Yuki), but with time it seems that he grows somewhat close  to him. He was basically abandoned by his parents who labeled him a  monster, and the only time they come see him is whenever they need  money. Hotsuma's past was shadowed by his fire abilities, and while  protecting a classmate, he ended up attacking a few of his classmates,  which isolated him from everyone else. Afterwards, he attempted to kill  himself, but Shuusei stopped him, giving Shuusei the burn scar. Hotsuma  constantly blames himself for Shuusei's scar and is scared of hurting  someone, but Yuki is able to calm him.
 
- Shusei Usui (碓氷愁生, Usui Shusei?)  Voiced by: Miyano Mamoru
 - The bearer of Kami no Me, God's Eyes. Shuusei, also part of the  guardians, is Hotsuma's childhood friend. He helps the police in solving  crimes with his "sixth sense". He seems to be a quiet and sensitive  person. He has a tendency of not eating a lot most of the time, as he  doesn't have much of an appetite. He disappears suddenly, after seeing  that Hotsuma was on better terms with Yuki, stating that he has 'served  his purpose' and recognizes the fact that Yuki was able to shatter  Hotsuma's fears of being a monster. Then he is kidnapped by Ashley and  put into a deep sleep never to wake again. Later on though, hearing  Hotsuma's voice pleading for them to live together, he awakens.
 
- Kuroto Hourai (蓬莱 黒刀, Hourai Kuroto?)  Voiced by: Kamiya Hiroshi
 - A professional shogi player prodigy who is very quiet and serious by  nature. But, once he decides to do something he'll put full effort into  doing it even if it means quitting something he loves e.g. shogi. He  gained a love for Shogi after he was taken in by Senshirou's  grandfather. He lost his original partner during the previous war and  Senshirou is now his second partner.
 
- Senshirou Furuori (降織 千紫郎, Furuori  Senshirou ?)  Voiced by: Hino Satoshi
 - A zweilt-in-training and is a klutz by nature. He is Tsubaki's  fiance by an arranged marriage decided by the family and decided to  become a zweilt after his grandfather was killed by the Opast Cadenza  whilst protecting him and Kuroto. He has a love for calligraphy.
 
Giou Clan
- Takashiro Giou (祇王 天白, Giou  Takashiro?)  Voiced by: Koyasu Takehito
 - Takashiro is first introduced as Yuki's older half-brother. When he  meets Yuki for the first time, he tells him that he and his father had  been looking for him ever since his birth fifteen years earlier. He is  also the head of the Giou clan. Although it is not yet revealed,  Takashiro seems to be hiding something from Yuki and the rest of the  Guardians. The truth is he preformed a forbidden ritual that allowed him  to take a dura into his body. Because of this he, unlike the other  Zweilt Guardians, has not been reincarnated. Instead he has lived for a  thousand years, remembering everything, including how the war with duras  first began. He also heals almost immediately after being injured. He  believes that in order to win the war, there have to be sacrifices. He  possesses a magic book much like Kanata, although his is red. It has  been told that Reiga was his friend. He is also the one responsbile for  continually causing Yuki and the Zwielt to reincarnate so they can  continue fighting Reiga. He then apologizes for lying to Yuki, telling  him that he is not really Yuki's brother, but Yuki forgives him, telling  him that despite that, Takashiro is still very important to him.
 
- Tachibana Giou (祇王 橘, Giou  Tachibana?)  Voiced by: Miki Shinichirou
 - The curator at Twilight Mansion and a member of the Giou  clan. Tachibana has an upbeat personality and likes to keep conversation  going.
 
- Isuzu Fujiwara (藤原 彌涼, Fujiwara  Isuzu?)  Voiced by: Narita Ken
 - Isuzu is the Giou's family doctor who works full time at the  infirmary located at Twilight Mansion. Isuzu is known for passing  out for various days from lack of sleep, which is caused by his  sleepless and restless nights of researching the subject of duras. His  words and actions about treatment come out as perverted whether or not  he is aware of it. He is fascinated by Duras and always wants to examine  Luka.
 
Others
- Wakamiya Kanata (若宮奏多, Kanata  Wakamiya?)  Voiced by: Ishida Akira
 - A childhood friend of Yuki, who grew up with him in the orphanage.  Yuki considers him to be like an older brother figure to him. He carries  the "Book of Raziel." Kanata frequently asked Yuki to come live with  him and appears to be against Yuki's residence in the Twilight Mansion.  He mysteriously appears in Ashlely's town and begs Yuki to leave and go  live with him, which Yuki declines to. Afterwards, Kanata's eyes seem to  turn silver, and his appearance looks very similar to Giou Reiga's. He  is actually Reiga's reincarnation. Kanata is revealed to be half human,  half duras. Due to an -as of yet- unspecified incident involving fire,  he has come to hate humans and desires their destruction.
 
- Yuki (Previous Life) (ユキ(前世)?)  Voiced by: Yukana
 
- Ibuki Shikibe (式部 為吹 , Shikibe Ibuki?)  Voiced by: Yuri  Amano
 - Takashiro's talented secretary. Ibuki is also the sister of Tsubaki.  She is also Yuki's aunt on his mother's side.
 
- Tsubaki Shikibe (式部 椿姫, ShikibeTsubaki?)  Voiced by: Hōko Kuwashima
 - She is Ibuki's younger sister and one of Yuki's aunts on his  mother's side.She also hates men, with an exception to Yuki.
 
- Fuyutoki Kureha (呉羽 冬解, Kureha  Fuyutoki?)  Voiced by: Kenji  Hamada
 - The butler of the main residence of the Giou clan.
 
- Aya Kureha (呉羽 綾, Kureha Aya?)  Voiced by: Sayuri  Yahagi
 
Although not much is yet revealed about Aya, Aya takes care of those  in the Twilight Mansion. She is also the younger sister of Fuyutoki.
- Katsumi Tooma (遠間 克己, Tooma Katsumi?)  Voiced by: Nobuhiko Okamoto
 - Katsumi is a full time cook at "Twilight Mansion" and a world class  chef.
 
- Masamune Shinmei (神命 正宗, Shinmei  Masamune?)  Voiced by: Shintarō Asanuma
 - He is a member of the Giou clan and is a necromancer in training.
 
Opasts
- Ashley
 - She is an Opast who was responsible for the "Sleeping Beauty"  syndrome and the abduction of male students. She likes good looking guys  and has a legion of low class duras that look like dolls at her  command.
 
- Elegy
 - She is also a General class opast who claims to be in love with  Zess(Luka).
 
- Cadenza
 - He is a general class opast who killed Kuroto's previous partner,  but left Kuroto alive. Then after Kuroto was reincarnated and taken in  by Senshiro's grandfather, Cadenza returned and killed the old man  whilst he protected Senshiro and Kuroto. They now both want Cadenza  dead. He is also known as the "Master Killer" due to his reputation of  turning on the person who summons him.