Maybe Mrs Black made some offensive remarks about Harry's friends or his family. For example, she might have insulted Hermione for being a Muggle - born witch, which would definitely make Harry angry enough to shout at her.
Often, Mrs. Granger in fanfiction is a character of great curiosity. She wants to explore every aspect of the wizarding world. Her intelligence makes her a valuable asset in many stories. She might be the one to figure out a difficult magical puzzle using her logical thinking. She can also be portrayed as a bit of an outsider trying to fit in. Despite her Muggle background, she tries hard to adapt to the strange customs and rules of the wizarding world. And her relationship with other characters, like Harry, can be quite interesting, sometimes acting as a surrogate mother or a mentor figure to him.
Another idea could be that in a fanfiction set in a parallel wizarding world, Mrs. Granger runs a magical lemon orchard. The lemons from this orchard have special properties. This could attract the attention of the wizarding community and lead to various adventures and interactions between Mrs. Granger and the magical folk, all centered around these unique lemons.
One common theme is family. Since Mrs Zabini has a family, many fanfictions explore her family dynamics, like her relationship with her son Blaise Zabini. Another theme is social status. As a part of the wizarding high society, her status is often a key element in stories.
Love and relationship growth is also a big theme. They might face difficulties in their marriage due to Harry's past traumas or the pressures of the wizarding society. Writers like to show how they overcome these issues and strengthen their bond. For example, in some fanfictions, Harry has nightmares from his encounters with Voldemort, and Ginny helps him through those tough times. This not only deepens their relationship but also shows their individual growth as characters.
One main theme is family. The Black family is a complex and important part of the Harry Potter universe. Fanfics about Mr. and Mrs. Black often explore family traditions, loyalties, and the impact of family on the characters' lives.
In some fanfictions, Mrs Granger is depicted as having a secret past in the wizarding world. For example, she might have been a powerful witch who chose to live a Muggle life for a while. This adds a whole new layer to her character and her relationship with Hermione.
One great Mrs Granger fanfiction is 'The Hidden Knowledge of Mrs Granger'. It delves into her backstory before Hermione was born. It shows her as a brilliant witch in her own right, with her own adventures at Hogwarts that were never mentioned in the original series. It gives a new perspective on Hermione's family and how her mother's experiences might have influenced Hermione's thirst for knowledge.
One popular Mrs. Granger Harry Potter fanfiction is 'The Granger Influence'. In this fic, Mrs. Granger plays a key role in helping Harry understand the wizarding world from a more scientific perspective. Another one is 'Granger Family Secrets' which delves into the family's history and how it ties in with the wizarding world. There's also 'Mrs. Granger's Magic' where she discovers some latent magical abilities of her own.
It could also cause a stir among the portraits in Grimmauld Place. The other portraits might side with Mrs Black and start to give Harry a hard time whenever he is in the house. Or, some portraits might be secretly impressed by Harry's courage and start to question their own long - held beliefs.