In a 'Harry adopted by Bill fanfiction', perhaps the story begins with Bill returning to England and finding out about Harry's situation. He realizes that Harry needs a more stable and loving family environment. So, he starts the adoption process. Harry then gets to learn about Bill's work as a curse - breaker from up close. They might also face some opposition from the Ministry who are skeptical about Bill's ability to take care of Harry, but they prove everyone wrong in the end.
Fleur would definitely be a major supporting character. As Bill's wife, she would play an important role in Harry's new family life. She could teach Harry some French magic or wizarding traditions. The other Weasley siblings could also be supporting characters. They might visit often and continue to be like Harry's extended family. Charlie could come and share his dragon - taming stories with Harry, adding more excitement to Harry's new life.
At first, it might be a bit awkward as they come from different generations in the wizarding world. But as they spend more time together, they start to understand each other's strengths and weaknesses. Harry admires Bill's knowledge of magic and his courage, while Bill is drawn to Harry's selfless nature.
They could be like brothers. Harry has a strong connection with the Weasley family already, and with Bill and Charlie, it could be a natural extension of that. They might look out for each other and support one another in any difficult situation.
He could start teaching Harry some defensive magic in case the abuser tries to come back. Also, Bill might use his connections to find a healer or a counselor who can help Harry deal with the emotional trauma of the abuse.
They might start as a sort of mentor - mentee relationship. Bill, being more experienced, can guide Harry in the wizarding world. As time passes, they could become like brothers, always having each other's backs.
I highly doubt it's a widely popular fanfiction given its rather strange and specific premise. Most popular fanfictions tend to focus on more common themes like romance, adventure or the characters' growth.
I'm not sure specifically as it's a very specific and likely self - created fanfiction. It could potentially be about a scenario in a fictional universe where Harry experiences this form of discipline from Bill. However, without reading it, it's hard to say more.
Yes, there are some out there. You can start by looking on fanfiction websites like Archive of Our Own. Some writers might explore unique scenarios where Harry and Bill have a moment of closeness that involves a kiss, often with different plot twists and character developments.
They could help Harry by teaching him new spells. Bill might teach him some advanced defensive spells he learned as a curse - breaker. Charlie could show Harry some unique ways to use magic around magical creatures. Hermione would of course be there to ensure Harry studies hard and understands the theory behind the spells.