Started believing I was a fictional character invented by me.
I told my daughter (age 7) that Santa is a wonderful character invented by adults.
How he invented such rough characters I'll never know - they were certainly nothing like their creator.
From that he wrote a first act, inventing characters to fit the plot.
He also invents characters and places like any other novelist.
They are fictional accounts which add characters invented by the author within historical events.
As for your emotions, memories, insights and invented characters, what makes you think anyone will care?
From now on, invent characters that are noble and good.
A fiction writer is thus free to invent very specific events and characters in the imagined history.
He'll invent characters out of whole cloth, like Falstaff in the history plays.