Sora Shiun'in/Relationship

Yūya Sakaki
Yūya was one of Sora's first friends (the other being Yuzu). Sora didn't have any friends growing up because everyone was too focused on becoming a soldier to make any. Yūya found him annoying at first, but this quickly changed. Even after finding out that Yūya was trying to take down Academia, Sora still considered Yūya as his friend.

Yuzu Hīragi
Yuzu was one of Sora's first friends (the other being Yūya). Sora didn't have any friends growing up because everyone was too focused on becoming a soldier to make any. Sora was the one who taught Yuzu how to Fusion Summon. He claimed he didn't do it for friendship, but later admitted that he did. Sora claims that he came to Standard to save Yuzu rather than capture her (though from what is still unknown). He is even willing to interfere with Reo Akaba's plans to protect her, as shown when he was willing to trade her to Yūya for Serena instead of taking her straight back to The Professor.