水瀬 小夜

伊月的双胞胎妹妹。与姐姐不同，她善于交际且性格开朗。 无法坐视不当对待，有着大姐头般的性格， 但一旦认准某事就会一往无前，也常有冲过头的行为。 她也对彰抱有爱慕之情，但是……。

简介来自 Bangumi · 由机器翻译生成

Sayo is Itsuki's twin sister. Unlike her sister, she is very sociable and cheerful. She acts like a big sister to everyone and won’t stand for injustice, but she often acts before she thinks. She also holds special feelings towards Akira, but... Hobbies: Playing with animals, pulling pranks and protecting Itsuki Favorites: Her twin sister (Itsuki), animals and Akira Behavior: Unlike her counterpart, she is very straightforward and overfriendly but can also be very harsh at times, too. She often acts without any thinking. But that's how all kids are, right? [Edited from MangaGamer and neo-X-saga's Walkthrough]

简介来自 VNDB

伊月の双子の妹。姉と異なり社交的で明るい。 不当な扱いは見過ごせない姉御肌な性格だが、 思いこんだら一直線な性格で、先走った行動も多々ある。 彼女も彰に想いを寄せていたが……。

简介来自 Bangumi