Kagami was in America until second year of middle school and has recently come back to Japan in his first year of high school. He is determined to surpass "The Generation of Miracles" and become the number one. Along with Kuroko, they're the only two freshmen allowed to play in matches. (Even though it looks like they always disagree over things, he and Kuroko – nicknamed Seirin's Freshmen Duo – are actually on good terms.)
At the start of the story, Kagami is shown to have a huge potential – good build, height, skill in basketball – but his strongest weapon is his inhuman jump. With those jumps (that gradually get higher and higher every time), he manages to block his opponent's attacks.
He's really bad at studying and always get low grades, even in English. He lives alone, has an enormous appetite and is unexpectedly good at cooking. In the past, he was attacked by a dog, and that made him afraid of dogs.
