It was created as an attempt to create a robotic super soldier, his creator Mark Lempke, design and the name of Sean was based in the model son he always sought. The android seemed perfect in every way, until Mark, what began atratar like his son, causing Sean had human emotions. To develop feelings I was like it was imperfect, causing the cancellation of the project. Mark was forced to dismantle Sean, but instead will erase the memory and sent to live with his wife Skylor Smith and stepdaughter Fiona Murdock, as a regular teenager. It was not until Thomas to appear to recover their memories and total access to their cybernethic superpowers.