Oliver Aiku

When Aiku was a child, he wanted to become the best striker in the world, but his coach and other adults tainted his dream with the philosophy of "playing for others". He lost the will to become the best striker in the world in time but decided wholeheartedly to become the best defender in the world to spite all the adults and coaches that told him to play for others and refused to help him pursue his own goals. He promised himself, though, that if a "true striker" ever appears, struggling to bloom in Japan, he will do whatever it takes for them to shine and prevent them from being tainted like he was.

Aiku has been shown to be a womanizer when he invited two girls to karaoke on a date when they did not know about each other. They slapped him and left because of his rudeness, assuming they would want to share him, but he seems to not be too worried about women.

Aiku lives up to his title as captain as he is the defender and peacekeeper of the Japan U-20 team and its players, as seen when he stops Ryusei Shido from harming their Ace and also keeps their Ace and other members in check with his charisma. Despite his seemingly jovial and friendly manner, Aiku changes dramatically when on the field, becoming a dangerous and highly skilled threat. Aiku can be a bit reckless, for he unnecessarily bet the fate of him and his team for a chance to beat the Blue Lock Eleven properly and prove something to himself. When the first half of the Japan National Representative is over, Aiku apologizes to his team for his recklessness and decides to play their trump card to prevent them from losing. Aiku can also be quite blunt; at halftime during the Japan National Representative match, he states that he wanted to see how strong the team was and tells the team that they're "weak" compared to the talented players at Blue Lock.

Aiku is not above showing his respect for those who have impressed him, as he constantly commented on Blue Lock's ability during the U-20 match and when he congratulated and shook Yoichi Isagi's hand at the end of the match for beating him and scoring an incredible goal. After the game, he seems to have no hard feelings but keeps his competitive nature.

Appearance: Aiku is a very tall and muscular young man with shaggy, dark purple (blue in the anime) hair with lime green tips and short facial hair. As a child, his facial structure stayed the same, just becoming sharper and more refined as he grew facial hair. Aiku is heterochromatic, and his eyes are different colors, with his left eye being green and his right eye being purple.

The Japan U-20 team in Blue Lock is a highly skilled national youth squad, now influenced by Blue Lock’s methods, featuring a 4-3-3 formation with a formidable defense and strategic offense led by Sae Itoshi.OverviewThe Japan U-20 team represents Japan in the FIFA U-20 World Cup within the Blue Lock storyline and has undergone significant evolution after being defeated by the Blue Lock Eleven. Following this defeat, the team is now partially under Blue Lock’s control, with top players from the Neo Egoist League selected to represent Japan in the upcoming U-20 World Cup, which is confirmed to take place in Japan. A hidden rule allows three additional players, known as the Buratsuta 3, to join through Side-B, though their careers are controlled by Hirotoshi Buratsuta. Fandom+1Formation and TacticsJapan U-20 employs a 4-3-3 formation, balancing attack and defense. The defensive line is anchored by the Iron Wall Quartet—Oliver Aiku, Teppei Neru, Kazuma Nio, and Miroku Darai—who coordinate to leave no weak spots and adapt in real time to opposing strikers. Goalkeeper Gen Fukaku provides experience and stability at the back. Two defensive midfielders disrupt attacks, while the offensive midfielder, Sae Itoshi, orchestrates play and supports the forwards. The three forwards—Teru Kitsunezato, Kento Cho, and Shuto Sendo—focus on finishing and creating scoring opportunities. Game Rant+2Key PlayersSae Itoshi: Offensive midfielder and playmaker, crucial for linking defense to attack; brother of Rin Itoshi from Blue Lock Eleven. 1Iron Wall Quartet: Oliver Aiku, Teppei Neru, Kazuma Nio, Miroku Darai; central to the team’s defensive strength. 2Forwards: Teru Kitsunezato, Kento Cho, Shuto Sendo; primary goal scorers. 1Goalkeeper: Gen Fukaku; experienced and reliable, anchoring the defense. 1

4 SourcesStoryline ContextThe U-20 team was initially Japan’s national youth squad but faced a pivotal match against the Blue Lock Eleven. Their defeat led to the integration of Blue Lock’s training philosophy, emphasizing egotistical finishing combined with strategic coordination. The team’s roster now reflects the top-ranked players from the Neo Egoist League, ensuring Japan fields a highly competitive squad for the U-20 World Cup. The team’s updated uniforms mirror the Blue Lock Eleven style, with the Japanese flag on the chest. Fandom+1Playing StyleJapan U-20 fuses strategic intellect with egotistical finishing, making them a formidable opponent. Their defense is layered, with Haru Hayate pressuring opponents, Itsuki Wakatsuki providing backup, and the Iron Wall Quartet securing zones. Offensively, Sae Itoshi drives the ball to the forwards, who capitalize on scoring opportunities. This combination of tactical discipline and individual skill makes them a challenging adversary for the Blue Lock Eleven