Toru Oikawa

Oikawa has been nicknamed the "Great King" and "Oikawa the Great" by Shōyō Hinata and "Assikawa", "Trashykawa" and "Shittykawa" by Iwaizumi
The white knee brace on her right knee is not, in fact, a knee support.
Since Oikawa has a nephew (whose surname is also Oikawa), it's most likely that he has an older brother. However, there have been recent Furudate strips hinting that he has an older sister instead.
Oikawa's nephew is named Takeru.
In his free time, he coaches his nephew and other children in the Lil Tykes volleyball classroom.
Favorite food: milk bread.
Her zodiac sign is Cancer.
Oikawa's birthday, July 20, is believed to be a reference to Alexander the Great, who shares the same birthday and is also commonly known as "the Great King".

Despite his flirtatious nature (which makes him very popular among the female students, with both Tanaka and Nishinoya envying him) and childishness (as noted by his nephew and Iwaizumi), Oikawa is an excellent player, well-rounded, and 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 lighthearted comments, but follows them 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 (Oikawa indignantly responds by asking why he would do that to his own teammates).
Oikawa holds a strong grudge against Kageyama, whom he mockingly calls Tobio-chan. This stems from his feelings of inferiority compared to Kageyama, who was hailed as a genius during his time studying at Kitagawa Daiichi. Kageyama may unintentionally bring out the more childish or outburst aspects of Oikawa's personality.

He works very hard, as evidenced by his intense practices. He has even injured himself from overwork in training. His own teammates have pointed out his rigorous schedule. Furthermore, Oikawa spends time watching videos of his opponents' matches, observing their moves ahead of time to plan strategies for how to defeat them. Despite this, he still makes time for rest on Mondays. His intelligence and sense of play are also unparalleled, as shown when he points out his opponents' weaknesses in a short period of time.

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 towards 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.

Occupation
Student (Previous)

Equipment
Kitagawa Daiichi High School

Number
1 (3rd year of high school)

Position
Captain - Shipowner

Sobriquet
"Great King" (by Hinata Shoyo)
Shittykawa, Trashykawa, Assikawa, Crappykawa, Lazykawa, Loserkawa, Idiot (by Iwaizumi)

Gender
Male
Sign
Cancer
Birthday
July 20
Age
18 (Aoba Johsai High School)
Height
184.3 cm
Weight
72.2 kg
Family
Takeru (Nephew)