She is a sensitive girl who has the strange ability of causing misfortune to those around her. This causes most people to avoid approaching her, with the exception of Sirius who nurtures strong feelings for her. Reika tries to avoid contact with people in general because she believes that her misfortune caused an accident that put her boyfriend Glen into a coma. She is the reincarnation of Scorpius.
Tsuburaya Mitsuhiko was a student in Teitan Elementary when Shinichi was enlisted into his class after he had been shrunk by the drug APTX 4869. Shortly afterwards, his classmates Ayumi and Genta had the idea of investigating an apparently haunted mansion, and they persuaded Conan to come along. When Mitsuhiko espressed his scepticism about supernatural hauntings, Genta forcefully 'persuaded' him to tag along as well. As it turned out, the haunting served as a cover-up for an old homicide case. Following its resolution, the foursome decided to stay together and form the nucleus of what would become the Detective Boys. It is later revealed that Mitsuhiko's parents are both teachers, and he has an older sister, Tsuburaya Asami, about ten years his senior. Mitsuhiko enjoys reading science books and takes a scientific approach to problem-solving. He is a smart and well-read first-grader who believes that technology can solve most problems. Due to his strict and formal upbringing, he tends to be very formal towards his elders, addressing them with the formal suffix "-san" without regard to the intimacy of their relationship. Mitsuhiko has a dislike for carrots, and will always eat them last (if ever) if he can help it.
Yoshida Ayumi is a student in Teitan Elementary when Shinichi was enlisted into her class after he had been shrunk by the drug APTX 4869. Shortly afterwards, Ayumi and her classmate Genta had the idea of investigating an apparently haunted mansion. They persuaded Conan to come along, and Genta also personally drafted Mitsuhiko when the latter expressed his criticism about supernatural hauntings. As it turned out, the haunting served as a cover-up for an old homicide case. Following its resolution, the foursome decided to stay together and form the nucleus of what would become the Detective Boys. For a time, Ayumi was the sole female member of the Detective Boys until Haibara joined the group. During a case involving a cache of stolen Italian gold coins just prior to the official formation of the Detective Boys, Conan saved the group from getting killed by the Mafioso who were also after the gold, earning Ayumi's gratitude which quickly developed into a serious crush. Ayumi is a naive and innocent little girl who shows courage from time to time and acts as the team's cheerful spirit. She has an open crush on Conan, which makes him uncomfortable, though Ayumi thinks that he has feelings for Haibara because he tries to protect her and she often sees them talking amongst themselves in private. Ayumi later becomes better friends with Haibara, and she allows Ayumi to use the more informal term Ai-"chan" to address her. When on a case, Ayumi often makes really simple observations that allows its progress and resolution. For instance, she unlocked one of the codes from the Momotaro container the Detective Boys found in Kurashiki by deducing that it was most likely referring to one of the statues at the Oohara Art Museum: they had to walk 25 steps from the statue towards the direction it was facing.
Mina represents Fukurokuju. The two are twins and the youngest members of the club, as the only elementary students. They have a tendancy to fall over and go to sleep if they expend even the smallest amount of energy, which they seem to lack, except when they transform in which case they are full of energy. Because they represent the two gods Fukurokuju and Juroujin (who are the gods of luck and fortune) they are almost the same person. Details about the twin's relationship are in episode 6.
She represents Hoteisama. She is a doctor.
Kappei is the only character in the visual novel who does not appear in the animated versions of Clannad. Is a mysterious nineteen-year-old young man who is travelling around. His goal in life is "to live like a man". Tomoya will meet Kappei if he chooses to avoid Kyou's scooter on the right side. Ky� intends to hit Tomoya as a revenge for Button running back home wet, but hits Kappei instead (in Visual Novel)