Super Dimensional Me

The memories in my mind seem to be missing something. I don't know about my past experiences, or even my own name. All I remember are some general knowledge about this world, like time. For example, the era I live in is Star Sea Year 687 within the game, and it was officially released in 688.,"The Haelan star model is similar to Earth, and the budding organization is an attempt to overthrow major political powers. If I remember correctly, all subjects in the Valkyrie Experiment underwent brainwashing and were turned into cannon fodder.",What is the essence of one's existence, true life Or just a set of data Soul transmigration。