Kaito Kid, also known as the Phantom Thief Kid, is a fictional character who appears as a prominent figure in the Detective Conan series, though he originated as the protagonist of author Gosho Aoyama's other manga, Magic Kaito. His true identity is Kaito Kuroba, a seventeen-year-old high school student who lives a double life as a world-famous gentleman thief.

The background of Kaito Kid is rooted in tragedy and a sense of familial duty. Kaito's father, Toichi Kuroba, was a world-renowned stage magician who also operated as the original Kaito Kid. When Kaito was a child, his father was murdered by a mysterious criminal organization in what was made to look like a magic accident. Eight years later, the teenage Kaito discovered a secret room in his home that contained his father's thief equipment. Learning the truth from his father's former assistant, Konosuke Jii, Kaito decided to adopt the mantle of Kaito Kid. His primary motivation is not personal gain but to lure out the organization responsible for his father's death. He learns this organization is searching for the Pandora Gem, a legendary jewel said to grant immortality. Kaito thus dedicates himself to finding this gem before they do, intending to destroy it, while returning all other stolen treasures after examining them.

The personality of Kaito Kid is a carefully crafted performance that contrasts sharply with his true self. As Kid, he is infamous for his flamboyant, arrogant, and theatrical demeanor. He treats his heists as grand public spectacles, sending detailed, often puzzle-like, warning notices to the police beforehand. He revels in leading law enforcement on elaborate chases, escaping at the very last second with a magician's flourish. He is a notorious charmer, particularly towards female audiences, and maintains an unshakeable "poker face" under pressure. In his daily life as Kaito Kuroba, he is a much more playful, mischievous, and less formal individual, often using his magic tricks to play pranks on his friends and classmates, particularly his childhood friend, Aoko Nakamori. Despite his cocky exterior, both as Kid and Kaito, he has a strong moral code and deeply dislikes seeing others get hurt, often going out of his way to protect people.

Within the Detective Conan story, Kaito Kid serves as a brilliant and recurring rival to the protagonist, Conan Edogawa (the teen detective Shinichi Kudo in disguise). Their rivalry began when Conan was the first person to successfully see through one of Kid's perfect disguises. While they are often on opposite sides, their relationship has evolved into a complex and mutual respect. Kid has assisted Conan on several occasions, most notably by disguising himself as Shinichi Kudo to help Conan avoid having his true identity revealed to Ran Mouri. In many of the Detective Conan films and special episodes, Kid becomes a central figure whose elaborate heists draw Conan into larger mysteries.

The key relationships in Kaito Kid's life are essential to understanding his character. His most important personal connection is with Aoko Nakamori, his childhood friend and classmate whom he secretly likes. Aoko hates Kaito Kid because the thief constantly humiliates her father, Inspector Ginzo Nakamori, who is in charge of the Kid task force. Kaito must constantly work to keep his dual identity a secret from her, leading to comedic and tense situations. His primary rival among detectives is Saguru Hakuba, a British-born high school detective who transfers to Kaito's school and strongly suspects Kaito of being Kid. Another classmate, Akako Koizumi, is a witch who knows his secret but chooses to keep it for her own enigmatic reasons. In the world of Detective Conan, his most formidable intellectual opponent is Conan Edogawa, whose deductive skills repeatedly challenge Kid's plans. Kid also garners the obsessive attention of Jirokichi Suzuki, a wealthy uncle of Conan's friend Sonoko, who sees capturing Kid as his life's greatest challenge.

Kaito Kid possesses an extraordinary array of abilities that make him nearly impossible to capture. His primary skill is masterful magic, which he uses for both grand illusions and precision sleight-of-hand. He is an unparalleled master of disguise and voice imitation, capable of flawlessly impersonating anyone, including Conan and even Kogoro Mori, without the use of electronic devices. His signature equipment includes a white cape that converts into a hang glider, a pistol that fires sharp, spinning playing cards, smoke and flash bombs, and various other tools for lock-picking and escape. He is also highly athletic and intelligent, with a noted weakness for ice skating and a deep, comical fear of fish.

As a character, Kaito Kid has shown a notable development from a young man initially driven by revenge to one focused on a greater purpose. While his core mission to find and destroy the Pandora Gem remains, his interactions with Conan and others have highlighted his fundamentally honorable nature. He evolves into a "gentleman thief" who operates by a strict code, never stealing for personal wealth and always protecting the innocent. In later appearances, he becomes less of an antagonist and more of an anti-heroic ally, even aiding Conan against the Black Organization on the Mystery Train incident by disguising himself as Shiho Miyano. Through it all, he remains a showman at heart, defined by his charismatic presence, his ingenious tricks, and his unwavering commitment to his father's legacy.