DJ (Short for Daniel J) is a recurring character that appeared in several episodes of Perception. He is the younger version of Daniel Pierce before he began to de-compensate and receive his diagnosis as Paranoid Schizophrenic.
DJ is portrayed as somewhat outgoing and confident, willing to socialise with other people, unlike in later life when he would keep to himself.
In his final appearance in Season 3, Episode 14, Romeo he was at the point when he began to suffer from symptoms of Paranoid Schizophrenia. In this episode he referenced Natalie, and he appeared to be slightly shaky, as though worried.