Thirty years prior to the events of the series, the city of Tokyo was destroyed in a massive earthquake. From the ruins of the former megalopolis, Kyuto was established. In this new city, supernatural occurrences are progressively increasing and the only one capable of unraveling them is Hyuuga Mayuki, a boy detective and esper.
- Mayuki Hyūga (日向 繭樹 Hyūga Mayuki?)
A twelve year old boy with what seems to be extraordinary problem-solving skills. The police are unable to pull anything out from his background, which seems to be purposely hidden. He has never attended school before and appears to be a genius in all subjects with the exception of physical education. It is later revealed that he has the power of Shinchi, a power given to the new head of the Hyuuga family. He's the head of the Hyuuga family.
Voiced by: Miyuki Sawashiro
- Seiran Shinano (信濃 晴嵐 Shinano Seiran?)
Mayuki's butler. Seiran was once called a "doll user" by Byakko during one of their encounters. He also is found occasionally in a secret base of some sort, where he can keep a close eye on Kyuto's happenings, as well as Mayuki's whereabouts. He belongs to the family of Shinano, a family that supports the Hyuuga family. He made a promise to Mayuki's mother that he'll always protect Mayuki. He's Shien and Seiju's brother and Mayuki's uncle in reality.
Voiced by: Junichi Suwabe
- Hatsumi Mieno/Sōka (三重野 初実 Mieno Hatsumi?)
Mayuki's maid. Mayuki once said that Hatsumi is always in a hurry to find him in the house that she trips over her own feet, which she will subsequently let out an outrageous scream. It is later revealed that she is one of the two "dolls" that Seiran controls. when in her aya or doll form she fights using her hair as a whip.
Voiced by: Kana Ueda
- Sanae Izumi/Yūhi (和泉 さなえ Izumi Sanae?)
Minori's busty older sister. Sanae is always looking to join in an adventure with Mayuki and his friends. It is later revealed that she is one of the two "dolls" that Seiran controls. when in her aya or doll form she uses a pair of claws to fight.
Voiced by: Ryōka Yuzuki
- Minori Izumi (和泉 みのり Izumi Minori?)
Minori is one of the first friends Mayuki made when he first entered school. She appears to be infatuated with Mayuki and can sometimes be seen competing with Yaya over Mayuki's affection.
Voiced by: Nana Inoue
- Yae Yatomi (弥富 ヤエ Yatomi Yae?)
Commonly known as "Yaya" or "Yayako." She appears to be suffering from asthma, but it was found out that she was actually suffering from Mineral Dust Allergy that is caused by pollution in the Industrial Center, where she lives. Yaya seems to be recovering after the trial. She appears to be infatuated with Mayuki and can sometimes be seen competing with Minori over Mayuki's affection.
Voiced by: Satomi Satō
- Rakuta Koga (古賀 楽太 Koga Rakuta?)
Rakuta is the older brother among the twins. He is very calm and calculating and always keeps his cool. He can predict events what will happen in the near future.
Voiced by: Marina Inoue
- Kōta Koga (古賀 幸太 Koga Kōta?)
Kota is the younger brother among the twins. Compared to Rakuta, he is more hot-headed and doesn't think much before he acts. He appears to be infatuated with Yaya, but often sees her going after Mayuki, which causes Kouta to envy him.
Voiced by: Romi Park
- Miyako Tomaru (戸丸 都 Tomaru Miyako?)
A female detective that was skeptical of Mayuki when they first met. Miyako has given Mayuki a certain degree of respect after clearing up some suspicion around him. She can be seen to be fairly concerned about him if given any information of Mayuki being in danger.
Voiced by: Sayaka Ohara
- Inogami Ryūsuke (猪神 隆介 Ryūsuke Inogami?)
He is a male detective whom Tomaru is always accompanied with in every phantom case together with Mayuki. He is also a close friend of Mayuki. He can be seen always serious and quite making fun when Tomaru is in serious mood.
- Shara Hyūga
Mayuki's mother. They share the same hair and eye color. She left Mayuki under the care of Seiran. She lives in Switzerland.
- Maru (マル?)
Mayuki's dog. He's a large dog with white fur. He always goes with Mayuki and his friends.
- Shien Shinano (信濃 紫炎 Shinano Shien?)
He's Seiran's older brother. Seiran hated him at first but understood him at the end. He's childish and irritating. He's the new headmaster of the school Mayuki attends. He lives in Switzerland and protects Shara. He went to Japan to check on his brother Seiran and to make sure Mayuki is alright. He's also a doll user.
She's Shien's "Aya" and Byakko's older sister. She also serves as the secretary of the headmaster of the school Mayuki attends. She usually carries a harisen with her and uses it on Shien if he irritates or annoys her.
- Byakko (白蟲?)
A mysterious woman who is looking for the power of immortality. She is later revealed to be Seiju's "Aya". When she was still young her older sister, Yoko, left her to become Shien's "Aya". This incident depressed her a lot so she decided to join Seiju, thus, becoming his doll.
- Seiju Shinano / Masaki Hyūga (セイジュ / 日向 聖樹 Seijū / Hyūga Masaki?)
He is Mayuki's father. He's the former head of the Hyuuga family before Mayuki. He's born in the Shinano family but because of his extrasensory perception, the Hyuga family adopted him to have an heir. After Mayuki was born, he became nothing. Because of that, he did bad things. He is jealous of Mayuki because he wanted Mayuki's power. He's Seiran and Shien's brother in reality. He's also a doll user.
|#||Title||Original air date|
|01|| Kyuto's Great Detective|
"Kyuto na Meitantei" (旧都な名探偵)
|02|| Mayuki's Determination|
"Mayuki no Ketsui" (繭樹の決意)
|03|| Leaning Tower Adventure|
"Shatou no Bouken" (斜塔の冒険)
|04|| The Truth of Red and White|
"Aka to Shiro no Shinjitsu" (赤と白の真実)
|After what appeared to be an earthquake, Mayuki and Kouta travel to the bottom of Tokyo Tower to reconnect the power source to the elevator to save Rakuta and Minori, who are trapped within it. A larger mystery appears to be present behind the odd events that occurred within the Tower.|
|05|| Kyuto's Elegy|
"Kyuuto Aika" (旧都哀歌)
|Yaya has been absent for several days, and Mayuki and his friends decide to visit her. Later on, they find out that the Industrial Center that Yaya resides in is actually extremely polluted, and her brother, Shichirou is a key witness of an upcoming trial against the town's mayor.|
|06|| Railroad Strategy|
"Bouryaku no Tetsudou" (謀略の鉄路)
|Mayuki and the gang race the clock to solve the mystery of where Shichirou has disappeared to. Byakko is found to be tied to this event as well, inevitably causing Seiran to once again step in.|
|07|| Kyuto, Bomb, and Black Tea|
"Kyuuto to Bakudan to Koucha" (旧都と爆弾と紅茶)
|Mayuki, Seiran, Hatsumi, and Sanae go to the Mutsunomori Building to watch a movie, but end up in a pinch with a possessed director who appears to be under the influence of Byakko. Mayuki begins to feel a slight uneasiness in these occurrences.|
|08|| Hatsumi's Agony|
"Hatsumi no Junan" (初実の受難)
|Hatsumi is mistakenly caught up in a murder relating to an urban myth that has been passed down throughout the Wakakusanmoegi Girls High School.|
|09|| Unforgivable Crime|
"Yurusarezaru Tsumi" (許されざる罪)
|10|| Atonement of the Scapegoat|
"Shokuzai no Ikunei" (贖罪の生贄)
|A mans corpse is found scewered to the top of a radio tower and the cops try to find the culprit. meanwhile Mayuki wonders if something was controlling the previous criminals and later decides to help with the case|
|11|| The Result of Desire|
"Yokubou no Hate" (欲望の果て)
|the previous cases culprit is killed by the mysterious woman in white|
|12|| Heart-Thumping Pool-Side|
"Pool Side de Doki" (プールサイドでドキッ)
|15|| Thoughts and Oaths|
"omoi to chikai" ()
|16|| Purple Flame|
|Seiran's brother arrives in japan and decides to lead the police around while messing around with mayuki and his friends at school.|
- Opening theme
- Ending themes
- "Dakishimete" (抱きしめて?) by Shiita Ө (episodes 1-13) </div>
- "Lovers' tone" by me ho (episodes 14-25) </div>