yeah gonna give you a scientific answer to your question a man can become a god if he accept to becoming a machine true conscioussness transfer you could become a god true death but,
I know it's not the answer you want but a answer working true your preset.
I think I want to read this fanfic (😅because I didn't like toaru no index that much) but thanks for writing an fanfic anyway (I would still read the other one)