Shigure Kitami
About
In chapter 23, he asked Yukina out, to form a bond with her. This was because Yukina said there is a special bond between her and Akira like there is one between Shigure and Mami, but their own relationship is shallow. So to strengthen the bond, Shigure asked her out but Yukina rejected him straight way, by not believing in what he said.
Shigure is angered whe he heard Yukina telling Akira to force a kiss on her, and takes her away before Akira can kiss her. Then after the incident, Shigure and Yukina decide to form a bond between them. Shigure told Yukina if he healed her weakness, then she will always remember him, which would result in making a bond between them. But before the bond could be formed, Mami's sudden love confession shakes Shigure and all of his thoughts changed to Mami's confession. He couldn't decide on how to reply and unknowingly ignores Yukina. Being jealous because of Mami, Yukina confronts Shigure and tells him to reply fast and not ignore her. But it is revealed that in reality Shigure was thinking of Yukina the entire time, because if he says yes, he wouldn't be able to be with her anymore. When Yukina hears this, she realizes they will not be able to keep their relationship. She drags him to Mami and tells her that she will not lose to Mami, since she is halfway into falling in love with him. After hearing Yukina's declaration everyone is surprised and thus Yukina and Mami's rivalry begin. After all this, Shigure finally realizes his love for Yukina.
Yukina was sure that she would win until she sees the smile Mami gave when she was talking about Shigure, being mesmerised by the beauty of a person in love, she starts doubting her victory. Therfore she goes to Shigure and tells him to start healing her weakness right then because she doesn't want to seperate from Shigure. Now the tables are turned and Shigure starts giving Yukina 'reverse missions', which only results in bringing them closer together.
Sakurai Takahiro voices Shigure in Drama CD