The international crime code of Kaito Kuroba is 14 12. Kudou Yū saku misread the scribble of "14 12" written by a reporter as "little boy" when reading the criminal information of the first generation Kidd (Kuroba Touichi, Kidd's father now, the world's top magician) and its later spread. The first words of "1" and "4" are "

I hate eating fish. At present, I know his identity as a servant (housekeeper) (his father), classmates Koizumi Akako and Bai Matan (suspects).

The child's full name is thief 14 12 (because the international criminal code is'1412'). Legendary thieves, super thieves who specialize in works of art, I like to commit crimes at night, wearing white clothes and special monocles. The cloak behind me can become a glider. I am good at all kinds of magic, and I am proficient in changing my face. I can imitate anyone's voice without props. After asking others, I can often dress up as others perfectly, regardless of gender, age and age, with an extraordinary memory. Stealing the target of the notice, playing with the police. The world called him "the magician in the moonlight" and "Arsène Lupin in Heisei". Elegant manners (especially women) give people a sense of being a gentleman. In short, the charm is definitely not lost to Kudou Shinichi. But usually stolen gems, paintings and calligraphy are either discarded or returned to their original owners.

The real identity is high school student Heiyu Kuaidou, a teenager who loves magic. Father Kuroba Touichi is a famous magician. The first generation thief boy (with a moustache) died many years ago and was assassinated for participating in a mysterious organization that stole jewelry. Because he found the secret room left by his father and knew that his father had been killed, in order to find out the murderer, he inherited his father's identity as a thief to attract the attention of the murderer who killed his father.

Besides magic, I also have a hobby of reading about myself in the newspaper after committing a crime. I like Nakamori Aoko since I was a child, but they often quarrel. Fish is the most feared thing in fighting, so Qing Zi often uses fish to scare fights. Qing Zi's father, Nakamori Ginzour, is a policeman. His goal is to arrest petty thieves, but he never succeeded. Kuaidou once said: "If a thief is a skilled, treasure-stealing and creative artist, a detective is a person who can only find fault with thieves and is a critic at best." The main competitor is Bai Matan, a transfer detective in London, but Conan was the first to expose his perfect face-changing skills, so they became the main competitors. The first time I met Shinichi, I stole the pointer from the bell tower. Know Conan's true identity (according to the understanding of the theatrical version of M3), but KID once pretended to be a newcomer to repay Conan for saving his white dove, so that Conan once again escaped the crisis of being seen through by Xiaolan. But in fact, he doesn't need to change his face for a new one, he just needs to change his hairstyle slightly (as understood in M8 of the theatrical version), because Jet Kuaidou and Kudou Shinichi are almost identical, and the people he likes are childhood friends, and they all look alike (Nakamori Aoko and Mao Lilan). When Kuroha first appeared in Detective Conan, he was dating Qing Zi, but it was raining, so he covered his hair with an umbrella. Xiaolan happened to meet him and thought that a quick victory was new. Naturally, he thought he had moved on, but later this misunderstanding was cleared up.

At present, there are many people who want to bring him to justice, such as Kudou Shinichi, Hattori Heiji, Chaki Shintarou (chief inspector of Search Division II), Nakamori Ginzour (police officer in charge of arresting Kidd), Suzuki, Kichijiro and Bai Matan (high school detectives transferred from London).