We don't have enough information to know exactly who Marie is in this story. She could be an ordinary woman with an interesting life, or someone with a special talent or gift.
I'm not sure who Marie specifically is in 'Marie the True Story' without more context. It could be about a real - life individual named Marie, but more details from the story would be needed to accurately define her.
Definitely. The comic version of Homelander is portrayed as having greater strength and capabilities. This is evident in his confrontations and the scale of his power displays throughout the comic series.