Akira Shimotsuki is Himuro Yukina's cousin. His parents died in a fatal accident when he was still a young child. He seemes to have a strong devotion towards his cousin Yukina because his life was saved by Yukina when he almost got hit by a car right after he heard his parents were no longer coming home. Akira is one of the only people who knows that Yukina is disguised as a cellphone novelist, Yupina. Akira is almost always seen eating food besides Yukina, such as melon bread. Being Yukina's cousin doesn't stop him from being in love with her. He's never been apart from her since they were children. Yukina saved him from being hit by a car, therefore Akira has a strong devotion towards her, where she then promised they'd be together always. Ever since, Akira has long wished to be with his cousin, not in a cousin-love way, but a lover way. He wanted Yukina to see him as a man as well, which she soon does. He seems to sometimes be protective of her when Shigure is around. He often tells her that he does not want her to be around him anymore. He also has confessed that he is jealous also. After finding out Shigure bit Yukina's nape of her neck, he then goes to kiss where Shigure did. In Yukina's novel, Shigure is a vampire, and Akira is a knight. So, Akira said that it is his duty to heal her neck where Shigure bit, and kissing has the healing power. When the four, Yukina, Akira, Shigure, and Mami went to the amusement park, they later on went on a ferris wheel, where Mami immediately took Shigure, stating that "if you kiss a person in a ferris wheel, they will be together forever" leaving Yukina and Akira behind. Mami gave a signal to Yukina after loosing the game they played, so Yukina had to confess her love to Akira forcibly. Akira then took the paper from her, asking what it was. He then acted as the person she was saying it to, and when she said it, he seemed incredibly happy, even though it was just a line. It seems as if Shigure and Akira have some sort of hate for each other, when seeing each other. Akira does not want him nor Yukina near each other, and whenever Akira sees his cousin crying, he assumes it is Shigure. He then tells Shigure to stop doing things to her. Akira finds out Mami has something on her mind that is bothering her, and why she is trying to break apart Shigure and Yukina. Later in the storyline, Akira is seen with Mami, often asking her to eat with him and Yukina and go to class with her, just to let Shigure see them together. Yuki Kaji voices Akira in drama CD.