Natsuka Sakurai (桜井夏香,Sakurai Natsuka) is one of the students from Class 3-2 during the second season of the anime.
Natsuka is smart, sensible and helps others a lot. She is a good friend of Fūko Takahashi and is called "Nacchan" by others.
Natsuka has black hair which almost appears to be blue. Fittingly, her eyes are blue as well. Under her mouth, a black mole can be seen. She wears a light red pin on her right bangs. As a Sakuragaoka High School student, she is usually seen wearing the school's uniform properly with black socks.
Natsuka is sitting in the middle of the first row, eight from both sides.
Natsuka's seat inside of her classroom (third row, third from the right, sittind behind Haruna, in front of Keiko Sano, next to Keiko Iida to the left and Ai Tsuchiya to the right).
Natsuka's character introduction card.
In the second chapter of Volume 4 of the manga, a member of Class 3-2 called Sakurai (桜井) was a candidate for the second leading role of the class play "Romeo and Juliet". The anime adopted the name and invented the actual character, as Natsuka can't be seen in the manga.
Both in the manga and the respective anime episode, Natsuka managed to get four votes.