清浦 刹那

榊野学园1年3班。世界的青梅竹马。 是个努力家，但性格不善于表达情感，主要依靠世界来应对这种场合。 从入学起就被伊藤诚吸引，在得知世界也喜欢诚后，决定支持世界。 在亲密的人之间，意外地也会顺势起哄。

摘自本作简介中该角色的段落

Setsuna Kiyoura is a student in year one of class three, who like Kotonoha, is on the student council as a class representative. One of the more inscrutable characters, Setsuna is a keen, focused and habitually tacit girl who tends to have and keep the most level head of her peers when situations go awry. She is Sekai's best friend, having grown up with her, and to a considerable degree is overly solicitous of her, to the point of hurting others to ensure that Sekai is happy. In Summer Days, Setsuna is shy and timid, in contrast to her more serious portrayal in School Days. Her mother, Mai, only makes an appearance in Summer Days. With the exception of Kokoro Katsura, Setsuna is the shortest character of the main cast, and is often mistaken for a junior high school student, a trait she is well aware and conscious of. [From Wikipedia]

简介来自 VNDB

榊野学園1年3組。世界の幼なじみ。 努力家だが、感情を表に出せない性格で、そうした場面を主に世界に頼っていた。 入学当時から伊藤誠に惹かれていて、世界もまた誠を好きであることを知り、世界を応援しようとする。 親しい人間の間では、意外に悪のりをすることもある。

简介来自 erogamescape