At the gym, Kuroko is surprised to see so many people trying out for the club and he is told that Teikō's basketball team is famous. He seems determined to join the basketball club.
The first day of Junior High, in April, Kuroko is walking in the crowd, with few people noticing him, as usual. When they split up, they promised that they would meet again in Junior High. There, he befriended a neighborhood boy, who was later revealed to be Shigehiro Ogiwara, taught him basketball. In 5th grade, Kuroko saw a basketball match on tv, got interested in it and started playing basketball on a nearby court, since there weren't any teams he could join. It has been shown that he has a soft spot for cute animals, like kittens and dogs ( Tetsuya #2). While initially antisocial towards his teammates, he gradually warms up and starts to openly express himself more. There are times where he uses his misdirection ability to run away, and also a time where he was late for a game but pretended to have been there from the start (until Kagami pointed out the sweat on his brow, indicating that he was actually late and had run all the way to school). In one omake he says that he can also become noticeable and does so by pulling his jacket over his head, making people automatically see him and laugh. Overall, he is a very calm, rational person, but it is shown that he also has his silly moments. Kuroko also lectures Kagami that he should deal with women more delicately. Amongst his friends, Kagami, Aomine and Kise are really shocked to see how easily Kuroko can cheer up Momoi and even knows what to do on a date. Outside the court, despite his unnoticeable personality, Kuroko is very gentlemanly when dealing with women. During his Junior High school basketball career, his "light" was Aomine, and now it is Kagami. The "light" would be the player he supports during a basketball game. He means that he is playing for someone else, and that he becomes stronger when the "light" is stronger. He has metaphorically referred to himself as a "shadow". When the situation worsens, he seems to turn talkative. When Kuroko gets angry, it gets very hard to beat him, as he is filled up with fighting spirit. His aura changes so drastically, that even Kagami gets scared when he sees him like that. Despite his initial kind personality, Kuroko gets extremely furious at dirty play, such as when his teammates were threatened and injured by foul methods in the Kirisaki Daīchi game. He has also displayed much respect towards fellow passionate basketball players and thinks that while senpais have to have pride, kōhais need to have respect. He has no presence and is quite unnoticeable, a trait that goes well with his misdirection. He is very hard working and always tries to satisfy the needs of the team above his own. Kuroko has a deadpan and straight forward personality. It has been noted that his bed-head is especially atrocious. It has blue trimming on the sleeves and vertically in the middle. The top piece of a gakuran is black, long-sleeved and has a standing collar which buttons from the bottom up to his chin. When out of training or matches, he wears his school uniform: the standard Japanese gakuran. His basketball shoes are white with a blue streak. He also sometimes wears black sweatbands. He wears the white, black, and red Seirin jersey with the number 11. His eyes are blue, and he has a blank gaze.
He has light blue hair that he styles to his left. Kuroko has a fragile outlook and a very small build for a basketball player which is why he is usually seen passing.