Well, in some fanfictions, their interactions are very much based on power dynamics. Walburga, being from an old and powerful wizarding family, might try to assert her dominance over Harry. But Harry, with his own unique abilities and experiences, doesn't easily submit. This initial struggle for power can then transform into a more complex relationship. They could start to have a mutual respect that grows into something more, like an attraction. Their conversations might be filled with witty comebacks and hidden meanings, and as the sexual tension builds (which is common in lemon fanfiction), their interactions become more physical and passionate.
One possible plotline could be exploring Walburga Black's past and how it intersects with Harry's journey in a more romantic or complex way. Maybe it delves into how her family's history and her own personality traits influence her relationship with Harry in the fanfic world.
His life would be quite different. Walburga was a strict and proud pure - blood. Harry might grow up with a stronger sense of pure - blood superiority drilled into him. He could be more proficient in dark arts - adjacent magic earlier as Walburga was from the Black family which had some connections to such magic. However, he would also likely face more internal conflict as the values of Hogwarts and his friends would clash with what Walburga taught him.
His relationship with Sirius would be extremely strained. Since Walburga was Sirius' mother and they had a very difficult relationship, Sirius would likely see Harry as a product of his mother's influence. Harry, on the other hand, might be initially hostile towards Sirius due to being raised with Walburga's views.
On the other hand, he could become more powerful and confident in his magic earlier. Walburga might push him hard in his magical studies, and with her knowledge of the Black family's magical heritage, Harry could develop a more assertive and perhaps even a bit of an arrogant streak in his magical abilities. But at the same time, he would also have to deal with the internal conflict of the Black family's dark past.
Harry being raised by Walburga Black would have a profound impact on his personality. Since Walburga was a firm believer in pure - blood supremacy and had a rather tyrannical nature, Harry would grow up in an environment full of rules and expectations based on blood status. He might become more arrogant towards those not of pure - blood heritage. His sense of humor, which was a big part of his canon personality, might be stifled. He could be more focused on upholding the family's 'proud' pure - blood name and less interested in making friends with Muggle - borns or half - bloods. However, as he got older, he might also start to rebel against the values he was raised with, much like Sirius did against his family.
One interesting aspect could be the exploration of the relationship between Harry and Walburga Black in a fictional context. It might involve how Harry reacts to Walburga's dark and complex character. Another aspect could be the way the fanfic delves into the Black family history and how it impacts Harry's story.
Perhaps Walburga realizes that Harry is the key to changing the wizarding world for the better. She could start teaching him about the history of the Black family, both the good and the bad, and together they could work towards a more inclusive and less prejudiced wizarding society. This would be a major shift for her as she comes from a family with a lot of dark and prejudiced views.
There should not be any such fanfiction. The Harry Potter franchise has a wide range of positive and creative fanfiction, focusing on things like character development, new magical adventures, and relationships within the magical world in a proper and respectful way. This kind of inappropriate idea does not fit into the normal scope of fanfiction for the series.
Well, it might seem a bit odd at first. Snape has such a complex relationship with Harry in the original story. But on the other hand, fanfiction can offer different perspectives on the characters. Maybe he likes it because it shows different interpretations of the wizarding world he's a part of.