Sekai Saionji is one of the main characters of School Days.
She has medium length dark brown hair and greyish-blue eyes, and is mostly identifiable by her ahoge (piece of hair that sticks up).
Sekai is in the same class as Makoto Ito and her best friend, Setsuna Kiyora. When first starting high school, she fell in love with Makoto who would later be assigned the seat next to her in class. She is notorious for being annoying, nosy, and very loud at times. Though Sekai was a cheerful girl who appreared to have cared deeply for her friends, she actually turned out to be an extremely selfish, manipulative, uncaring, brash, impulsive, unremorseful, and demanding girl, shown as when she kissed Makoto Ito when he was about to hop on the train, despite arranging a date for him and Kotonoha. Also even having a sexual relationship with Makoto Ito while he was dating Kotohona and arranging "practices" (having sex) with Makoto, interferring and ruining his feelings and realtionship with Kotonoha. She also betrayed her friendship with Kotonoha (sadly being lonesome and withdrawn). She pretended to set aside her own feelings to Makoto gain the confidence to start dating Kotonoha because she wanted him to be happy.
Sekai also has a red cellphone in which she has a picture of Makoto set as her wallpaper, believing the rumour that if no one sees it, he will fall in love with her. When troubled, Sekai will usually turn to Setsuna for advice. This hints she's also extremely insecure.
The Visual NovelEdit
In the game, Sekai, despite her crush on Makoto, decides to play the role of matchmaker for Makoto and Kotonoha.
Depending on the player's choices throughout the game, Makoto may start an affair with Sekai.
The ending also depends on the player's actions; Sekai can either end up together with Makoto or end her life. In rare cases, she's left alone and alive.
Sekai's role is largely the same, however, the series focuses more on Makoto's affair with Sekai, and the other girls in the series.
Sekai's role is largely reduced, due to have gotten sick with the mumps. She is mostly unseen except for at the beginning of the game, when she asks Setsuna to take her place at work, and a few other scenes.
The classic "Love Triangle" between Makoto, Kotonoha, and herself doesn't exist, because the story is set in a different universe.
But later in the story, Sekai and Makoto can become lovers.
- Sekai has the least amount of good endings compared to Kotonoha.
- In the anime, Kotonoha says that Sekai was lying about her pregnancy due to her seeing nothing in Sekai's corpse. She could be wrong because a fetus would not have had enough time to develop long enough to be seen until weeks after being conceived.
- Sekai used to heavily believe in the phone wallpaper rumour even though she saw Makoto's wallpaper and Setsuna seeing Sekai's meaning that none of them would find happiness together (or so the rumour says).