Toichi Kuroba is Kaito Kuroba's father, a world-renowned magician, and the original Kaitou Kid.
Toichi as Kid was the greatest jewel thief in Japan as well as the best stage magician in Japan until he was murdered in a fake magic accident. Sometime prior to his death, Toichi had his attendant and friend Konosuke Jii promise him that he would never tell Kaito about his thieving.
Toichi seems to have a playful atmosphere about himself, like his son Kaito Kuroba, as demonstrated by his amusing magic tricks to delight his audience.
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This character is basically the helpful dead dad