Grace is presumably the protagonist. Since the story is named 'grace and the time machine story', she is the central figure. She may be an ordinary person at first, but through her association with the time machine, she embarks on extraordinary journeys through time. Maybe she's a curious person, always eager to explore and learn, which is why she gets involved with the time machine in the first place.
Natalia Grace is the person at the heart of this complex story. She was adopted, and then there were doubts and disputes regarding her age and behavior within her adoptive family.
Since we don't have much detail, Natalia Grace could be anyone. She might be an artist, a scientist, or just an individual who has had a series of life - changing events that she wants to share. It's possible she has a unique background or has been through something that makes her story worth telling.
There are many people in the world with different names, and Grace Laura Story is one of them. It could be that she is a student studying at a university, engaged in a particular field of study such as literature or history. Or she could be a volunteer in a local charity, helping those in need. She may also be an athlete participating in some sports at a local or regional level. Since we have no other information, all these are just speculations.
Definitely not a true story. Grace: The Possession is part of the horror genre, where creativity and imagination take the lead to craft a suspenseful and terrifying narrative.