From the beginning.

Tabito Karasu (Karasu Tabito) is a contender of Blue Lock. when first introduced, he was ranked #3 during the Third Selection and he later played as a defensive midfielder for the match between Blue Lock Eleven and the Japan U-20 team.

Karasu is a tall and lean young man with spiky dark purple hair and a mole under his left eye. He also has blue eyes. In Blue Lock, Karasu wears the standard-issued body suit (black with gray stripes) and tracksuit. During Second Selection, he wore Team Red's #69 jersey and wore Team B's #69 white jersey during the Third Selection. Only once the Japan U20 match begins does he don the official Blue Lock player uniform with jersey #6. During the Neo-Egoist League, he wears Paris X Gen's uniform.

Karasu tends to look down on people he finds "mediocre." He is wary of his surroundings and is able to control and produce chemical reactions with those around him. He is intelligent but has a sharp tongue and never misses a chance to insult someone, whether friend or foe. He has his own rules that he forces upon others to make matches go as planned. He dislikes it when anything goes wrong, even if it doesn't make a big difference so it looks to others like he is always complaining. During the U-20 match, Karasu showed his leadership ability on defense, often communicating with the other defensive players to strategize against the quickly incoming U-20 players. He commands players like Yo Hiori and Kenyu Yukimiya in terms of attacking and defending, even if the players are aware of what to do. He is also willing to use every advantage at his disposal, as shown when he asked the referee to card Ryusei Shido for happening to kick Rin Itoshi in the face. Under his confident demeanor, Karasu considers himself to be mediocre. His trait for finding others' weaknesses and teasing them into submission was a form of protection to keep others from realizing his own true nature. He is fully aware of his mediocrity, and he respected those who he considers "extraordinary." This personality trait is what made him so compatible with Eita Otoya.

forwards: also known as strikers, have the main objective of scoring goals. They are often the players who get the most attention since their role is designed to be in a scoring position. They also take part in penalty kicks and corner kicks when the opposing team kicks the ball out of bounds. They are normally the players in charge of starting off the game at the start and halftime. midfield general: a central midfield player who absolutely controls the midfield area, directing team play and breaking up the opponent's attacks. They are known for having the biggest influence on their team's overall performances, driving them forward to attack, putting sustained pressure on the opposition, and leading by example when the team is defending.

sharp analytical ability: Karasu is renowned for his tactical shrewdness, having a reputation for targeting an enemy team's weakest link/player and focusing his plays against them (as stated by Hiori). His analytical ability was at such a level (along with his ball-keeping) that Ego made the decision to position him as the defensive midfielder of the Blue Lock 11 to act as the beating heart of the team, transitioning from defense to offense. Karasu has demonstrated an incredible grasp of tactics, being able to breakdown the U-20's defensive setup and the likely steps they will take to prevent an attack. After doing so, he was able to organize an attack with both Otoya and Chigiri to break through their defense, leading to Blue Lock's second goal. Karasu has also shown good awareness, knowing when to stall in the defense against Sae, giving his team time to organize, as well as when to join the offensive line, providing an extra option. Expert Ball Control: Karasu has the best ball-keeping sense in Blue Lock due to his spatial and tactical awareness and his unique ability to control space with his hands. By gauging the distance between himself and his opponent, Karasu uses his body (and more specifically, his arms) to block them off from the ball, controlling the space and enabling him to either steal the ball from them or dribble past. Feints: Karasu, in conjunction with his ability to control space with his hands, uses devastating feints to his advantage. He typically feigns carelessness with the ball to draw his opponent in before shifting the ball away, as well as shifting the opponent's center of gravity with his hands. Through his expert use of feints and spatial control, Karasu was able to dribble past at least 2 players at once (in Isagi and Shido), as well as maintain possession when pressured by 3 players at once (Isagi, Shido, and Nanase).

the blue lock is a training facility built to attract top Japanese soccer players who will live in the facility and follow a strict training regimen designed by Jinpachi Ego himself. The center of the facility also contains a soccer arena that is used to host professional matches. There are five stages in the project, but only one player will be able to complete it. The player who makes it to the end of the project will become a bomber in the Japanese league. Players who are eliminated from the project will be barred from the Japanese league forever. New challenges are constantly appearing in the Blue Lock, which eliminate a huge number of players. The building is a massive structure that takes up the entire area of a large cliff in the mountains of Japan and reaches the height of a skyscraper. The building is shaped like a pentagon and is thus divided into five separate sections. Each section is designated as a stratum, and the stratums contain a variety of different rooms, including living quarters, a dining hall, gyms, dedicated training rooms, several soccer training pitches, a soccer arena in the center that can host professional matches, and even enough space to host multiple training sessions simultaneously.