Family[]
Miki Yoshikawa[]
Miki is Yuki's older sister.
Romance[]
Tooru Ishikawa[]
Sometimes, there are hints that both Yuki and Tooru have some romantic feelings for each other, but none realize it. But now, it is clear that Yuki likes Tooru even though she tries to deny it. Now, she pretends to be dating Tooru to reject Akane Yanagi's confession.
In Chapter 73, it is confirmed that Yuki and Tooru are not officially dating. Despite their mutual attraction and liking each other, they stay in a limbo where they're not quite dating, but they're definitely more than just friends.
Friends[]
Kyouko Hori[]
Hori is Yuki's classmate and best friend. Yuki usually asks Hori to hang out, but Hori declines. Yuki is supportive of Hori and Miyamura's relationship. Yuki even confides with Hori, such as when Yuki talks about Hori's "cousin," Konoha, who she likes (which is Miyamura). She is also quite reliant on Hori, especially with schoolwork. Although they're best friends, Yuki doesn't know much about Hori outside of school since Hori tries to hide this from everyone.
She is often encouraged by Hori, such as learning how to bake, and is someone she can usually rely on for help. An example would be when Yuki wanted to reject someone's feelings and didn't want to hurt them.
Izumi Miyamura[]
Yuki has little interaction with Miyamura, but they seem to be on good terms. At first, Yuki thought Miyamura might have been a hardcore otaku who collected figurines, although that has changed. Unbeknown to her, Miyamura is the boy she likes since she doesn't recognize Miyamura when his hair is up and believes that he is Hori's cousin. After being told about who her crush was, she gave up on him.
Because Hori, Yuki, and Ishikawa have been seen to flock around Miyamura during classes to work together on projects.