Kei Karuizawa/Relationships

Yōsuke Hirata
She seems to have close relationship with him as when school first started she cheered on his idea of the class introducing themselves. After several days of school, they seem to have formed a bond as they are often seen together. In truth, they're just pretending to be in a relationship in order for Kei to not get bullied in school so it is unknown how they really feel about each other.

Kiyotaka Ayanokōji
During the survival test, when Suzune suggested Ayanokōji joined Hirata to watch over the boys in the class, she notes on him being invisible to the rest of the class. This shows that she barely acknowledges his presence in their time as classmates.

In the light novels, she seems to form a very close trusting bond with Kiyotaka, where Kiyotaka is shown to trust her more so than others, and in volume 6 of the light novel, it is hinted that she develops a crush on Kiyotaka.

Kikyō Kushida
Kei and Kikyō are appear to be in good terms. In episode 2, Kei went to Kikyo for points as she was out of it after blowing through her own funds and seemed desperate for points as she used their friendship as an excuse to do so but it appears Kikyō didn't go through with it.

Satsuki Shinohara
Satsuki Shinohara is one of Kei's friends in Class 1-D.

Maya Satō
Maya Satō is one of Kei's friends in Class 1-D.