Tōru Oikawa

Oikawa has chocolate brown hair that extends outwards, and eyes that are 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 (though Iwaizumi notes that these expressions are rarely genuine). He tends to make victory signs that are often accompanied by wide grins or a wink. Another well-recognized expression is the one he makes to Kageyama which is sticking out his tongue while smiling and closing one eye (which is why Iwaizumi punches him).

Oikawa is of a fairly decent height for a volleyball player, standing at just over 6' 11". A white brace is placed on his right knee, making it appear as though he is wearing a different colored knee brace. On the court, Oikawa wears the standard turquoise and white uniform of Aoba Jōsai High School, and his jersey is adorned with the #1, a classic among captains. He also wears dark grey sneakers with blue accents. During the practice match with Karasuno High School in Episode 7, Oikawa wears the number #13.

Despite his flirtatious nature (which makes him very famous among the female students, both Tanaka and Nishinoya envy him) and childishness (as noted by his nephew and Iwaizumi), Oikawa is an excellent, well-rounded player and is very serious when it comes to volleyball. He is known to have 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 up with a serious or intimidating tone. Despite his flirtatious and dismissive 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, with you being different, he can become very clingy.