Hartley Rathaway also known as The Pied Piper is the son of Osgood Rathaway and Rachel Rathaway and Former Member of S.T.A.R. Labs. When he was an employ S.T.A.R. Labs he worked mainly with his Mentor Harrison Wells and acted in the role of Harrison Wells's Protege. During the night of The Event when The Particle Accelerator exploded his hearing was altered and he became a Metahuman angry and blaming Harrison Wells for what happen to him he leaves S.T.A.R. Labs.