Well, first of all, the story would have to completely re - imagine Harry's early life. Bellatrix and Snape's relationship would need to be developed in a way that is believable for them to have a child. Harry would likely be caught between two very different worlds. He might be shunned by the wizarding community because of his parents' associations. His personality would be shaped by the cruelty of Bellatrix and the brooding nature of Snape. The whole Hogwarts experience would also be different as he might not have the same friends or face the same challenges. It would be a very different 'Harry Potter' story with a much darker undertone.
It would be extremely dark and complex. Harry's life would be a mess of conflicting loyalties. Since Bellatrix is a fanatical Death Eater and Snape has his own secrets and motives. Harry might grow up in a more hostile environment compared to the one in the original story. He could be trained in the Dark Arts from a young age, which would make his character very different from the Harry we know who values friendship, love and justice.
Yes, there are some fanfictions with such a wild and unorthodox concept. However, this goes completely against the original 'Harry Potter' canon which clearly states Harry's parents are James Potter and Lily Evans. In fanfiction, writers often like to explore 'what - if' scenarios that are far from the original story line, just for the sake of creativity and exploring different character dynamics.
It would be extremely strange. Harry is known for his connection to the light side, while Bellatrix is one of the darkest characters. If he were their son, perhaps he would struggle with his own identity. He might have been raised in a very different environment, surrounded by Death Eaters, but still have some innate goodness in him that would cause internal conflict.
It would be extremely dark. Harry would likely grow up in a very different environment, surrounded by Death Eaters and their ideology. His relationship with the Order of the Phoenix would be completely changed. Maybe he would be more conflicted about his loyalties, not as straightforward as in the original story.
In a 'Harry is Snape and Lucius son' fanfiction, the character dynamics would be radically altered. Harry's personality might be a blend of Snape's brooding and Lucius's aristocratic arrogance. The story could explore how Harry's relationship with other characters like Dumbledore, Hermione, and Ron changes. For example, Snape might be more protective of Harry from the start, and Lucius could have some secret plans for his son that involve the dark side or the power structure of the wizarding world. Also, the whole concept of the fight against Voldemort could take on a new meaning as Harry's family ties are now intertwined with some of the more morally ambiguous characters in the series.
Well, it could be a story full of inner turmoil for Harry. He would have the complex genetic makeup of two very different and powerful wizards. Snape's more brooding and conflicted nature combined with Voldemort's dark power. The story might explore how Harry deals with his own identity, and how the wizarding world reacts to this new revelation. It could also change the entire dynamic of the fight against Voldemort, as Harry would have a very different connection to him.
It would be very dark. Harry might grow up with a completely different set of values, influenced by Bellatrix's extreme loyalty to Voldemort. He could be trained as a Death Eater from a young age, and his magic might be used for more sinister purposes compared to the canon where he uses it for good. His relationships would be warped too, perhaps having a different view of Hermione and Ron, or even seeing them as enemies.
It would be very strange. Harry's whole identity and story would be flipped. He might grow up in a Death Eater - influenced environment, which would change his views and values completely. His magic might be taught in a very different way compared to how he learned at Hogwarts in the original story.
Well, a possible plot is that Harry discovers his true parentage in a very dramatic way. He could be in the middle of a battle or a difficult situation at Hogwarts and suddenly realize that Snape and Bellatrix are his parents. This would completely change his perception of himself and his place in the wizarding world. He might then have to deal with the consequences of this revelation, such as how the Order of the Phoenix and the Death Eaters view him.
It would be extremely strange. Harry's character would have to be completely re - imagined. His relationship with other characters like Hermione and Ron would be very different. Instead of the Gryffindor - Slytherin rivalry he had in the original, there would be a whole new family - based dynamic. And Snape's and Malfoy's characters would also need to be adjusted to fit the role of being Harry's parents.
I'm not sure if there is such a specific fanfiction. It's a rather unusual and dark concept considering Bellatrix's loyalty to Voldemort and her actions in the original story. Fanfiction can be very diverse, but this would likely be a very niche and perhaps controversial take on the Harry Potter universe.