Yukino is the older amongst the two. She's very fond of snacks and Sakuya often trades snacks with Yukino for Kanade's pictures. She is a member of their school's swim team.

Spoiler

Later in the series, Yukino decides to work part time in order to be able to pay for Kanade's art cram school. However, Kanade refused at this because she felt that if Yukino started working part time and she attended the art cram school, they will get to spend less time with each other. Yukino insisted and started working anyway which in turn created a strain in their relationship.