Daisuke is the main protagonist of Heat Guy J. He is a skilled fighter and a good detective, if a little lazy.
Daisuke Aurora is a member of the City Safety Management's Special Unit. The unit is newly formed and its only other members are Daisuke's android partner J and Kyoko Milchan, who handles the administration of the unit. Daisuke or Dice for short works for the Special Unit by the grace of his older brother Shun. The two brothers have a very strained relationship and the reasons for this are not clear from the start. We do find out eventually that their family has a very traumatic past and it has shaped both men in very different ways. When Dice was a small child his mother walked out on him and his family. As if that was not enough their father, a prominent politician, was murdered by an illegal android. During the attack Dice's brother Shun shielded him from an explosion and suffered major scarring to his back as a result.
Daisuke initially comes across as a bit lazy, but in reality he just has a very relaxed attitude to life and likes to do things at his own pace. In the early episodes it is apparent that Dice is only doing barely enough work to justify his salary and does not care much for Special Unit. So while he initially comes across as a somewhat selfish and lazy character his true personality comes through eventually and we see Dice is a good-hearted man who cares a lot for the people around him. He is a talented detective and frequently figures out things that have the police stumped. He has a great talent for seeing people and events as they really are and as such he is a hard man to fool. He is very intelligent and extremely intuitive and resourceful. He is also very skilled in unarmed combat and it’s just as well as the low budget of the special unit does not allow him to carry much ammo. He gets bored very easily and when he is not on an assignment he can normally be found lying on the couch in the Special Unit office. Kyoko is constantly berating him for not doing his paperwork and case reports and its clear Dice has no time for such things.
He has a great partnership with J and while the first episode suggests he would not think twice about destroying him if J turned on him, he develops a good sense of camaraderie with J and is very loyal to him and protective of him. As corrupt a city as Judoh can be Dice believes in the city and its people and does not seem capable of hate. Even when it comes to his mother who abandoned him or the criminals responsible for his father’s death Dice shows no ill feeling towards them. This probably has a lot to do with the fact that when his father died he was taken in by Shogun, a friend of his fathers, and raised by him. Shogun seems to share a lot of the same sentiments regarding Judoh and its people. His strained relationship with his brother is a direct result of the paths their lives took following their fathers assassination. While Dice was taken in by Shogun, Shun was a teenager at the time and having already been so hateful towards their mother and being at such a volatile age, when their father died Shun suffered a total mental breakdown and spent 2 years in hospitals and closed himself off to the world and never dealt with his anger. Dice wishes he could help his brother let go of his anger but their is little opportunity for that given that Shun looks down on Dice as a layabout who does not take anything, especially his job, seriously.