J is the android Heat Guy J in the anime of the same name. He has been given the name Heat Guy because of his need to release steam from his body through exhausts when he overheats.
Heat Guy J or J for short got his name from his need to expel steam from his body when he overheats. Androids in the city of are illegal because it is possible to program an android for evil and also because there have been many android attacks in the past, such as the murder of Daisuke’s father, which led the city to pass a law making androids illegal. Daisuke’s brother shun managed to find a loophole in the law which allowed J to be built and assigned to the special unit. He is the only legal android in the city, though his identity is supposed to be a secret from the general citizens. J was built by the brilliant and beautifulAntonia Belucci, and we find out later that J’s appearance is somewhat influenced by Antonia’s father.
Needless to say J is incredibly strong and fast and can take a lot of damage. His preferred attack seems to be super charged punch that no man or machine ever gets up from. He was built to be Dice’s partner and as such his personality and AI were designed to compliment Dice. He has a constant bio link with Dice and so can detect changes in Dice’s vital signs so he can tell if he is danger. He was programmed to act human and as such has been programmed with many phrases which he elicits on many occasions, though sometimes his machine brain influences these sayings and the result is sometimes hilarious. One instance in particular stands out where Antonia stops by and J is supposed to say she looks like she has lost weight but instead says something like “Antonia, your body-mass index has apparently decreased by 0.2%” Some of his other phrases are very profound and sometimes sum up the current situation perfectly and while some of them sound cliched most of the time they fit the tone of the episode well; some examples are
"The deeper a man's sorrow, the drier his tears"
"A Man should not show signs of pain in front of the enemy"
"A self-respecting and honourable Man does his best every day"
"A Man who is overly influenced by accepted ideas cannot step into the future"these phrases help define his personality and make the character all the more likeable
.J is also a powerful information tool as not only does he posses an incredible amount of information in his database but he can wirelessly access the net from any location and can access company servers and protected files.