He makes a show of refusing to work with Sora to then doing so and was adamant that they have not made up or anything. When it is suggested that Sora thank Sunao for saving him he peeks round a curtain and stares at Sora until he says something. After he helps bring Sora back from his Yoru personality Sunao brings others to help him. Otherwise he is quite reserved yet checking back and spotting Sora watching him in class he sticks his tongue out at him. Sunao resorts to physical violence since he cannot stand someone who forgets everything, which is something he does, and is something he is quite insistent on. This causes him to become irritated with Sora when he blames him for being unable to provide answers that he has no way of knowing either. Having lost his memories Sunao is also unaware that he has an alternate personality named Ran. When Sunao was embarrassed at the costume he had to wear Sora assured him that he was with Sora to alleviate his concerns. Unless Sunao makes an issue of something in which case Sora will often match it he is supportive of him. Sora contemplates the distance he fell and confidently announces his arrival at a science lab. Confiding in Nanami and Minato he affirms there are no memories of Sunao and considers him weird especially when he called himself Ran. Saying sorry for making Nanami worry about him Sora feels it is thanks to him that he became more balanced. Unable to make sense of a situation Sora considers himself running away may have hurt Sunao's pride but wonders why he is being so considerate of him. He gets comically flustered at some of Sunoa's actions and statements.
Sora is easy going but can become embarrassed.
He is childhood friends with Sunao who like him develops another personality, Yoru. Due to the Culture Festival, our class decided that we were going to perform "Swan Lake" and made me play the part of the "prince." Sunao, being so slender and delicate to the point that he could be mistaken for a girl, was, of course, chosen to play the role of the "princess." But since he hates to deal with people, he didn't like that idea too much. Sunao and I are childhood friends and also college roommates.