His nickname is derived from his hairstyle ("permanent"), he is tall and skinny (though his nameless Manga counterpart had quite a fatter form). Perm often displays the most character development, including being the only one of the Stormtroopers to have a visible girlfriend.
Kojima Genta is a student in Teitan Elementary when Shinichi joins his class as Edogawa Conan. Shortly afterwards, he and his classmate Ayumi decide to investigate an apparently haunted mansion, and they persuade Conan to come along. When their friend and classmate Mitsuhiko expresses his skepticism about supernatural hauntings, Genta forcefully 'persuades' him to tag along as well. As it turns out, the haunting is a cover-up for an old homicide case. Soon after, the accidental acquisition of a treasure map leads Ayumi, Genta, Mistuhiko and Conan on a hunt for a cache of stolen Italian gold coins, during which Conan saves them from getting killed by the mafia members who are also after the gold. After the case is resolved, Mitsuhiko joins Genta and Ayumi in forming the nucleus of an amateur detective group, the Detective Boys. Genta is quick to pronounce himself the leader of the group, but his lackadaisical leadership abilities are commonly neglected in the field, and in fact everyone (even Genta) unconsciously views Conan as the group's actual leader. Genta's school shoe locker is used as a mailbox for any of their fellow students to present them with a case to solve. Genta loves food, especially unagi, and can eat more than all the other Detective Boys members combined. When discussions of money come up, Genta tends to think about it in terms of how many unagi bowls he could buy. He also tends to mess up certain Japanese terms with similar-sounding words (especially if the latter are related to food) and sometimes has trouble reading even the most common Kanji, which on occasion causes some ridicule from his classmates and friends. His brash personality, lack of awareness of his surroundings, and tendency to not think before acting often lands the Detective Boys (or at least himself) in sticky situations. Even though he is brash, outspoken and can be intimidating, Genta is actually very kind and dependable. He is a good friend of Ayumi and Mitsuhiko, and has been shown to greatly admire his father, who is considered to be a classic "Child of Edo". (Source: Detectiveconanworld.com)
Lum (also referred to in English dubs as Lamù) is a beautiful Oni alien who is capable of flying and generating electrical shocks. She is extremely popular and is famous for ending her sentences with ~datcha (loosely translated as "yes?" or "you know?"). Except when in her school girl's uniform, she usually wears a sexy outfit consisting of a tiger-striped bikini and knee-high go-go boots. While generally good-natured, sweet, and innocent, Lum also has a very hot temper. Her dream in life is to live in a "Sweet Home with Darling" in which she keeps house and raises babies while Ataru works. Unfortunately, Lum's idea of "cooking" is to take very spicy ingredients like jalapenos, cayenne peppers, and Tabasco sauce and irradiate them with an alien energy bazooka until they carbonize into inedible, crystallized nuggets. As an alien she has access to many bizarre gadgets whose use she really doesn't understand all that well, leading to comedic results. Differences between human and "Invader" physiology also drive many stories, like the time Lum's horns begin to grow larger after she is bitten by a cow, or the time she becomes drunk by eating pickled plums. (Source: Wikipedia)
His nickname is derived from his height ("chibi" means "small" or "short"), he is a timid crybaby, speaks with a cracked voice, and is often beaten up by the rest of the Gang of Four. He is often together with Kakugari. He also has buck teeth like that of a beaver's (though his nameless Manga counterpart did not have this).
Race: Demons Height: 172 cm (5'7") Weight: 58 kg Also known as the "Earth King." Amaimon is supposedly the second son of Satan and another Demon Prince of Gehenna. Unlike his father and elder brother Mephisto, Amaimon had little interest in Rin after their first encounter. He is a human-like demon. He has a spike of hair which is lightly colored compared to the rest of his dark green hair. He wears a jacket that has cross bones as buttons. He also wears a long sleeved green shirt under his jacket, which is ripped at the ends. He appears to be calm and collected, but very confident in his powers. However he shows great anger and annoyance when someone gets in the way of his fun. He is very playful and doesn't take things seriously when it comes to fighting strong combatants which hints that he is very skilled in combat. (Source: Ao No Exorcist Wikia)
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.