Yōsuke Hirata/Relationships

Yōsuke is a friendly young man being one of the most sociable and kind people in Class 1-D. His kind nature has allowed him to be elected as the one of the class representatives.

Kei Karuizawa
She seems to have close a 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 become a couple or at least formed a bond as they are often seen together.

In truth, they're just pretending to be in a relationship so that Karuizawa would not get bullied in school so it is unknown how they really feel about each other. However, it shown he does care for her as when Karuizawa's underwear is stolen, Hirata searches the boys for them though he covers for Ayanokōji after finding them on him; he asks for the panties as he will suffer less being Karuizawa's boyfriend. In return, she seems to trust him as she selected to be part of the guards for the boys after the girls demanded the boys being separated from the girls.

Kiyotaka Ayanokōji
Hirata is one of the few people in Class D to have any interaction with Ayanokōji.

They first met when Class D started to introduce themselves and Hirata applauded him for at least trying to make a good impression after he messed up somewhat.

In the months after this, they barely interact but during the cruise Hirata tries to get Ayanokōji to help him get Suzune to open up and get him to socialize with the rest of the class.

During the survival test, he and Ayanokōji work together in getting things ready for the camp. When Karuizawa's underwear is stolen, Hirata searches the boys for them and though he finds them on Ayanokōji (after Ike placed them on him) he covers for him, to the latter's surprise. Ayanokōji soon questioned him on covering for him as Hirata reveals he knows that Ayanokōji wouldn't do such a thing. This implies he trusts him to a degree, despite barely knowing him. Before the test ended, Ayanokōji gave Hirata the news of Ibuki and Suzune as he sunk into despair at the class failing. Ayanokōji soon asked for a favor which was to make him the leader and told Hirata the other class leaders while giving Suzune credit. His actions allowed the class to succeed and relieved Hirata who had no idea of Ayanokōji's role.

In the light novels, it appears Hirata has caught on to some Ayanokōji's actions which have helped their class proceed.