Nobuko Sasaki

Nobuko Sasaki (佐々城　信子,) was a lecturer at a university in Tokyo. She was also featured in one of the light novels, Dazai Osamu's Entrance Exam.

Appearance
Sasaki was a young woman in her twenties, she has long dark brown hair, and grey eyes, she wears a white bolero jacket over a cream shirt, with a light grey skirt and dark tights.

Background
Sasaki was the Azure King's girlfriend. After his death, she took the role of the Azure Messenger to carry on his ideals and take revenge on the Detective Agency (specifically, Doppo Kunikida) whom she blamed for her lover's death.

Plot
In episode 7, Sasaki texted Detective Agency to set up a meeting in a deserted building, in order to reveal her true identity. When Kunikida, Dazai, Rokuzō were waiting there, with Kunikida questioning Rokuzou about the true identity of the bomber, Sasaki tried to shoot Kunikida with a pistol from the dark side, but only ended up hitting Rokuzou who found her and pushed Kunikida away. Sasaki then revealed everything about her identity, girlfriend of Azure King, and the reason why she caused bomb cases under Azure King's name. Kunikida tried to persuade her to give up, but she declined, and said that Kunikida is so much like Azure King, as they both were obsessed in pursuing their goals. Sasaki then tried to shoot Kunikida again, but eventually she was shot to death by Rokuzou at his last gasp who learnt her relation with Azure King, who got his father killed.

Trivia

 * In real life, Sasaki Nobuko was Kunikida Doppo's first wife. After a whirlwind romance that involved virtual elopement and the defiance of her parents, Sasaki Nobuko married Kunikida Doppo, only to leave him 5 months later.