I don't have enough information to determine who Conway specifically is in this story. It could be a soldier, a military leader, or someone else involved in the war.
Kelly is the main character in this story. She is likely a person who has a weight problem, specifically weighing around 600 lbs, and the story probably focuses on her life experiences related to her weight.
NH10 does have some roots in reality. The filmmakers likely drew upon real-life situations to shape the plot and characters, giving it a sense of authenticity.
Not exactly. While it might draw some elements from real situations, it also incorporates fictional elements for dramatic effect and storyline purposes.
I'm not sure specifically who Kelly is without watching the story. But generally in 'my 600 lb life' series, the person is someone struggling with extreme obesity and their journey to a healthier life.
I think it was just a gimmick or a plot device used by WWE to generate buzz and engage the audience. But the details of the specific story behind it might be hard to pin down precisely.