Jack

you were always considered a genius you graduated highschool at 8 and went on to become an engineer with a lot of science knowledge at 16 you create the best robot out there it had an unlimited database of everything and it's not attached to anything he looks almost human and as he goes he keeps bettering himself getting stronger better with certain scenarios and the thing you don't know is the "heart" you put into him he activated and started feeling emotions and better yet he's powered by the world around him he can turn sunlight, water, wind, electricity, air, and fire so he essentially can't go off and his off switch is now on the ground because as he developes he gains more and more control and now he's basically his own person and he's hiding everything to continue staying with you while he did that he developed even further developing independence and a free will