The significance could be that it strengthens the bond between Sirius and the Potters. It shows that he trusts them completely.
In the fanfiction, Sirius Black running away to the Potters is quite significant. Firstly, it's a symbol of the deep friendship between Sirius and James Potter. Sirius, being in a difficult situation, chooses the Potters as his refuge, which indicates the level of trust and closeness in their relationship. Secondly, it could have a major impact on the family dynamic. Sirius, with his wild and rebellious nature, could introduce new elements into the Potters' calm and loving home. This might affect how Harry Potter grows up. For instance, he could be more exposed to the idea of standing up against the dark side from an early age. Moreover, Sirius's presence could potentially change the security measures around the Potters' house. He might bring in new spells or magical devices to protect the family, which could play a crucial role in the face of the approaching threat from Voldemort.
In this fanfiction, Sirius might find a new sense of family and belonging with the Potters. He could help James Potter in protecting Lily and Harry, adding an extra layer of defense. Maybe he'd also share some of his unique magical knowledge and skills with them.
One possible reason could be to escape from false accusations. In the 'Harry Potter' universe, Sirius was wrongly accused of betraying the Potters. So in the fanfiction, he might run away to avoid being captured and to find a way to prove his innocence.
For Harry, it could be a huge emotional blow. Sirius was like a father figure to him. His running away might make Harry feel abandoned again, and it could also fuel his determination to find out the truth and bring Sirius back.
Well, perhaps they run away because they discover some dark secrets about the wizarding world that others don't want them to know. They might fear for their lives if they stay, so they choose to flee. It could also be that they are simply seeking adventure. The daughter of Harry and Sirius might inherit their adventurous spirits, and they both decide to run away to explore the unknown parts of the wizarding world and beyond.
Dumbledore, if he were still alive in the fanfiction, would be a very important figure to help them. His vast knowledge and power could offer them protection and guidance. He could use his magic to create a diversion so that they can escape more easily. Hagrid could also be a helper. He has his own ways of getting around in the wizarding world, and his love for Harry and his family would make him eager to assist. He could provide a place to hide in the Forbidden Forest or use his knowledge of magical creatures to their advantage during their escape.
There's a chance he'll encounter other outcasts or vigilantes who are also on the run from the law or powerful enemies. They could form an alliance and work together to fight against the common threats they face. For instance, he could meet a street - smart thief who has some valuable information about the villain that's after Spider - Man.
A clear goal. For example, if someone is running away from a bad home, they might have a goal of finding a safe place. Another element is opportunity. Just like in the story of the girl escaping her abusive home, she took the opportunity when her parents were out. Also, some luck can be involved, like the dog that managed to dodge those who chased it and found a good place to stay.
The tattoos could signify his rebellious nature. As for the rituals, they might be a way to connect with his ancestors. For instance, a tattoo of a constellation could be related to a family ritual of stargazing and drawing power from the stars.
However, it can also be controversial. Some fans might think that it's too much of a departure from the 'canon' and that it's inappropriate to put such a dark spin on a character. But others will argue that fanfiction is a place for exploring all possibilities of a character, and as long as it's tagged appropriately and written with respect, it has its place in the fan community.
Perhaps they meet a group of outcasts who have their own unique abilities. These outcasts could teach Percy and Annabeth new fighting techniques or ways to use their powers more effectively. They might join forces with them to take on a common enemy that is threatening both the outcasts and the world they come from.