User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-58.186.93.140-20140620070818

Here's my guess: Theory 1: Gray is Silver's father, swap the body with his son to become young again, costing him his memory. That's why Silver feels disgusted toward Gray.

Theory 2: Gray, Silver and Deliora was ONE, and Gray is good whereas Silver is Evil. Deliora used magic to extract his good side resulting to extract both Gray and Silver, the human form, out of his body.

Theory 3: As everyone already predicted, Gray is Silver's son. Maybe Gray is the one who remove his father's monster form (Deliora).