 A scar consisting of two black parallel lines has been shown close to the neck of several super-powered characters.The scar is the mark left by the two-pronged needle of a pneumatic injection device, which, as revealed in a biography of Hana Gitelman in the "Heroes 360 Experience", injects a radioisotope to allow tracking by the Company.Peter Petrelli, the character who has the ability to mimic other people's abilities, has mimicked Claire's ability of cellular regeneration.