Handsome Jack

Handsome Jack (real name John) was a code-monkey turned Hyperion CEO who took control of Pandora after the Vault was opened.

Biography
John sent a satellite to Pandora to monitor the Vault Hunters, and used his daughter's siren ability to communicate and guide them.

Once the Vault of the Destoryer was opened, and the monster vanquished, John had the idea to excavate the Destroyer's eye and use it as a laser on the newly-built space station, Helios.