Harrison Bergeron is the protagonist in the story. He is a young man who has extraordinary abilities, both in terms of physical strength and intelligence. He rebels against the society's forced equality by breaking free of his handicaps.
Most likely not. Ava seems more like a made-up tale to engage and captivate the audience. It might draw inspiration from various elements but not be based on a real event or person.
Harrison Wells isn't part of the comic world. He's unique to the TV adaptation. The show introduced him as a new element to the story, separate from the comic source material.
I'm not sure about the Ava Wood story, but Ava Wood could be a kind - hearted protagonist. She might be the one who always helps others in the story, whether it's her neighbors or strangers in need.