Gerald Robotnik

Professor Gerald Robotnik (プロフェッサー・ジェラルド・ロボトニック Purofessā Jerarudo Robotonikku?) is a fictional character from the Sonic the Hedgehog series who first appeared in Sonic Adventure 2. He was a human scientist and the grandfather of Maria Robotnik and Dr. Eggman. Widely acknowledged as one of the greatest scientific minds of all time, Gerald was responsible for several groundbreaking creations, such as the Space Colony ARK, the Biolizard, Artificial Chaos, the Chaos Drives, and his greatest achievement, Shadow the Hedgehog, making him a modern day scientific Da Vinci.

Over fifty years prior to Shadow the Hedgehog, Gerald was asked to lead Project Shadow, a medical program for researching immortality, which he accepted in hopes of finding a cure for a fatal illness afflicting Maria. While Gerald completed the project by creating Shadow the Hedgehog, though not without taking drastic measures, he was taken into custody by the military when his work was deemed too dangerous. When learning that Maria was killed by the military, Gerald slipped into madness and spend his last days plotting revenge at humanity.