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) disappeared many years ago. It is said that he was assassinated because he stole jewels and joined a mysterious organization. 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. Haidong, a black market, stole many artworks (most of which are precious stones-his father's killer is looking for "Pandora" jewels), and has been the target of high school detectives Bai Matan and Edogawa Conan (Kudou Shinichi) for many times. But he always put the stolen things back intact, which is why Qing Zi called him a stupid thief. The full name of KID is KID 14 12 (because the international criminal code is'1412'). Originally, he didn't have the name Black Market Haidong, but when he gave a speech in Kudou Yū saku, he mistook the reporter's scribbled "14 12" for "boy". 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 perfectly as others, regardless of gender, age and age, with an extraordinary memory. Stealing the target of the notice, playing with the police. Elegant manners (especially women) give people a sense of being a gentleman, and sometimes they show naughty side. In short, the charm is definitely not lost to Kudou Shinichi. But usually stolen gems, paintings and calligraphy (mostly just stolen gems) are either discarded or returned to their owners.