Q39: In ‘Another Time’, who is Kyle Klim? How can he swap his consciousness to his past self in 2028, when he didn’t exist in that time?
He is a person who knows things that he should have not known.
There is no specific rule that you have to be yourself to possess a psyche.
In 999, young Akane and 21 year old Junpei communicated. The developed version is to be able to move yourself entirely, so if your frequency matches, then it is even possible to jump into another person’s body.