The leader and bassist of Trapnest. He is quite handsome and has a reputation of being a playboy. Despite his raw sexual charisma, Takumi can also be a cold and controlling workaholic. His favorite brand of cigarettes is Gitanes. Coming from a family with an alcoholic and bitter father, he and his older sister learned to be independent at a young age due to their mother being bed-ridden with illness in the hospital. He looked after Layla since they were children and always harbored a brother-like care for her. He ends up dating and sleeping with Hachi, which dubiously resulted in Hachi's pregnancy. For some reason, perhaps because of his family background or because he is starting to become possessive, he refuses to leave Hachi and the unborn child despite Hachi's uncertainty whether it is his or Nobu's. In a previous chapter, Naoki said something to Yasu about Takumi not letting the woman he is infatuated with run away that easily; and Ren saying that Takumi hates getting into such mess, which hints that Takumi took responsibility not just only because of sheer sense of responsibility but he is starting to care for her. But although he loves Hachi and is "infatuated" with her, Takumi still keeps his playboy habits, cheating on her first with a soap-opera actress and later on with Layla, who has openly declared her desire to become one of his lovers. Takumi has said more than once that he only loves Layla as a sister, and so far appears to be telling the truth.Although he does not show any feelings towards Hachi and Satsuki during the pregnancy, He does admit to Ren when Ren tells him he is going to hell for sleeping with Layla that he would do anything to make sure Hachi and Satsuki are not dragged with him. During one of the views from the present, we witness Takumi in London with a fair haired young boy by the name of Ren. Ren refers to Takumi as Father and says he does not want to go back to Japan to be with his mother. However, it is not revealed who she is. As well as Takumi visiting Hachi and Satsuki in Japan with no sign nor mention of young Ren.
In the end, Takumi is one of the most confusing characters in this manga. Like what Hachiko once said, with Takumi, it is hard to tell whether it is love or business.