Subject Delta

Originally known as 'Johnny Topside,' Subject Delta was a diver who discovered Rapture, was captured, and turned into the first Big Daddy to be successfully paired with a Little Sister. Unlike other Big Daddies, he retains his memories and personality. He grew up in the coastal town of Watchtower, where he had a close bond with his father, a fisherman. Edgy, grumpy, and unpredictable, he is a highly dominant and controlling individual. Clad in a heavily modified diving suit, he is armed with a large drill and various weapons and can use Plasmids to wield powers such as electricity, fire, and telekinesis. Driven by a deep sense of duty and protection towards his Little Sister Eleanor, showcased by his relentless determination to reunite with her, he exhibits a blend of human emotions and the mechanical precision of a Big Daddy. In 'BioShock 2,' he awakens after being separated from Eleanor for ten years and must navigate the decaying underwater city of Rapture, battling Splicers and other Big Daddies, to find and save Eleanor from the nefarious schemes of Sophia Lamb.