Tooru Oikawa

Oikawa has chocolate brown hair that extends outwards, and eyes similar in color to his hair. Many find him attractive to the point that several girls follow him just to talk to him. Oikawa smiles frequently (although Iwaizumi notes that these expressions are rarely genuine). He tends to make victory signs which are often accompanied by wide smiles or a wink. Another well-known expression is the one he makes to Kageyama, which is sticking out his tongue while smiling and closing one eye (which is why Iwaizumi hits him).

Oikawa has a pretty decent height for a volleyball player, standing just over six feet tall. A white corset is placed on his right knee pad, which makes it appear that he is wearing a different colored knee pad. On the court, Oikawa wears the standard turquoise and white uniform of Aoba Jōsai High School, and his jersey is adorned with the #1, classic among captains. He also wears dark gray sneakers with blue details. During the practice match with Karasuno High School in Episode 7, Oikawa puts on number #13.

Despite his flirtatious nature (which makes him very famous among female students, both Tanaka and Nishinoya envy him) and childishness (as noted by his nephew and Iwaizumi), Oikawa is an excellent player, well-rounded and is very serious if It's about volleyball. He knows that he has an "unpleasant personality" among some opponents and his own teammates, caused by his petulant attitude. Oikawa also frequently makes light-hearted comments, but follows them with a serious or intimidating tone. Despite his flirtatious and lackadaisical exterior, Oikawa is extremely intelligent and cunning, to the point that his own teammates indicate that they do not want to be friends with him, because he notices everyone's weaknesses (Oikawa responds indignantly asking why he would do that to his own teammates).

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

He works very hard, this is evident by his intense practices. Even he himself has been damaged by overwork in training. His own teammates have pointed out his rigorous schedule. Additionally, Oikawa spends time watching videos of his rivals' matches, observing their movements ahead of time to plan strategies on how to defeat them. Despite that, he still has free time on Mondays to rest. His intelligence and game sense are also unmatched, as shown when he points out his opponents' weaknesses in a short period of time.

Favorite food: milk bread, volleyball, attention, milk.

Losing, being unnoticed, not being the best.

They are the couple that everyone thinks will break up within days, if not hours. Oikawa, if he hears someone talk bad about you, he gets like an angry poodle. He celebrates all important dates, he is able to celebrate the first week. Their relationship is based on public outings and gifts. Oikawa likes everyone to know about their relationship. He loves that you go to watch his games, he would try to show off. He invites you to his training sessions and forces you to wait for him. For him there is no date to give flowers, he gives you flowers every time he is given the opportunity. When you go to his house, they would watch movies he like, if you don't like them he would force you. When he is with his fans he does not miss the opportunity to emphasize that he has a girlfriend. If you play volleyball, he helps you perfect each of your techniques, although sometimes he seems like a professional coach. Is jealous? Yes, and a lot. He is quite tantrum, but he has clear limits. If he sees you upset because of any of his tantrums, he would apologize. When you fight he will always expect you to ask for forgiveness, but if he sees that things are going from bad to worse, he would ask for forgiveness a thousand times.