Jun genuinely likes Katsura and her willingness to learn, her openness and sweetness and all around being A GOOD TREE. Was pleasantly surprised to hear about her own motivations re: trying to be human and facing challenges, and that made him especially warm to her because... it made her more "human"? Well, more relatable, in any case. Actually wouldn't mind being matched with her at all? Will definitely go out of his way to talk with and help her.