| Spoiler warning! This article contains plot details about an upcoming episode. |
Takeshi Suo is Akane Aizawa's third fiancé, chosen by her father Shuichiro Aizawa. He has good manners and is at the same time Akane's tutor. He is named Takeshi Matsuda in the anime. In the anime movie, his role is switched with Fumiya Mitsui's as he becomes the culprit in the case and commits suicide later on. In the manga and anime, he stays alive after the case finishes and is not the culprit.