Adam is one of the main characters from Armed Police Batrider.
Adam was an assassin-for-hire, doing assassinations for as long as he can remember, probably even when he was a child. To him killing was something natural, as he felt no emotions from his killings. One day he made a fatal mistake, ending killed by his target. However, some months later he was revived, with a new mechanized body and a opportunity to redeem himself from his past crimes by joining the Zero-Cops to take down Giagantech Cybertron. Adam joins the Criminal Team, along with Birthday and Tag-T.
On his individual ending, Adam starts feeling remorse for the many lives he took, disappearing without leaving a trace, though many reports appear of people who claimed to have seen Adam, either dead or living as a recluse.