SCP-590 appears to be a young male, approximately 16 years of age. The only benefit he receives from his powers is apparent longevity, as he has not aged since his arrival at the Foundation. Although in all aspects a normal teenager, when SCP-590 touches any other human, he heals all injuries and ailments, physical and mental, they may have. As an odd side effect, SCP-590 receives the injuries upon himself, being subjected to all the pain, and the aftermath. He is Jack and Mikell's brother, TJ.