Toru Oikawa

Oikawa has burgundy hair and matching eyes. Many others find him attractive, to the point that several girls have followed him. Oikawa often smiles (although Iwaizumi notes that these expressions are rarely genuine). He often makes victory signs or large waving gestures, which are usually accompanied by wide smiles or a wink. Another trademark expression of his is sticking out his tongue while smiling and closing one eye.

Oikawa is quite a decent height for a volleyball player, standing just over six feet tall. He wears a white brace on his right knee due to a previous injury. While on the court, Oikawa wears a standard aqua green and white Aobajohsai High uniform, emblazoned with the number one. He also wears dark gray sneakers with blue accents. Other times, Oikawa dresses in the Aobajohsai uniform, which consists of pants with dark brown accents, a cream-colored vest, a dark red tie, a lavender button-down shirt, and a white blazer. During a practice match with Karasuno High,[1] Oikawa wears a green No. 13 vest over a blue undershirt.

He is also shown to wear glasses in one instance, but it is possible that he does not wear them as he mostly wears contact lenses or simply does not have such poor vision that it would hinder him during his daily routine.

Despite his flirtatious nature and childishness (as pointed out by his nephew and Iwaizumi), Oikawa is an excellent player, well-rounded, and is extremely serious about volleyball. He is known to have a "disgusting personality" among opponents and his own teammates because of his cocky but outwardly irreverent attitude. Oikawa also often makes light-hearted comments, but follows them up with serious or intimidating musings. Oikawa is extremely intelligent and cunning, and easily discovers the weaknesses of his teammates and opponents.

Oikawa holds a grudge against Kageyama, whom he calls Tobio-chan. This is due to his feelings of inferiority when compared to Kageyama, who has been hailed as a prodigy since his time at Kitagawa Daiichi. Kageyama may unintentionally bring out the more childish or rash aspects of Oikawa's personality.

Oikawa works extremely hard and often takes heavy injuries after his normal practices with the team. This has led to him getting injured in the past. Additionally, Oikawa spends time watching past matches of his rivals, observing their moves in advance and planning how to defeat them. Despite this, he still takes Mondays off to rest. Oikawa is ambitious, but it is shown that he also has feelings of inferiority towards those he considers better than him, Ushijima and Kageyama for example. This is one of the main reasons why he works so hard.

A former member and setter of Kitagawa Daiichi Junior High, he won the "Best Setter Award" in his prefecture during his third year at the aforementioned school. As a former upperclassman and senior setter of Tobio Kageyama, he almost hit him once after Kageyama asked him to teach him how to serve, but was stopped by Hajime Iwaizumi. He later felt guilty and showed remorse and apologized to Kageyama. He had been blessed with more athletic ability than most people and a good sense for things as well; even so, there was always a wall present that he could not overcome. The junior high section of Shiratorizawa Academy, which had become the strongest in the prefecture, and the "Herculean" Wakatoshi Ushijima, who was ranked among their players.

In his final high school tournament, he and his team faced Team Shiratorizawa and won a set for the first time. They placed second to Shiratorizawa in the results, and it was there that Oikawa received the Best Setter award.