Hermione could be a big part of it. She might be the one who discovers the magic or the theory behind Harry being able to adopt himself and helps him work out the details. She could also help with taking care of the younger Harry, teaching him things like how to study magic more effectively.
Ron could also be a supporting character. He might be initially skeptical about the whole 'Harry adopts himself' idea but then comes around and helps in practical ways, like getting supplies for their new 'home' where Harry is taking care of his younger self. He could also provide some comic relief in the otherwise quite strange situation.
Dumbledore could be an interesting addition. He might not fully understand what Harry is doing at first, but as he figures it out, he could either try to stop Harry or, in a more positive scenario, help him. His wisdom and power could add a new layer to the story, especially if Harry has to justify his actions to Dumbledore.
Dumbledore could play a significant supporting role in some versions. He might be guiding Hermione in her new role as Harry's guardian from the shadows. Neville Longbottom could also be a supporting character. He could be Harry's study partner when Hermione is busy, and they could exchange knowledge about different plants and potions. And of course, the Weasley family as a whole might be there to support them, with Molly Weasley perhaps cooking them delicious meals from time to time.
His best friend could be a great supporting character. Maybe someone who is always there to encourage Harry when he faces artistic blocks or self - doubt. They might provide practical advice, like helping him find new art supplies or suggesting new techniques.
Hermione would likely be a main supporting character. She could help Harry in coming up with ways to educate Tom and keep him on the right path. Also, Ron might be there, providing some comic relief and also acting as a sort of brother figure to Tom, showing him what a normal family - like friendship could be like.
Harry Potter could be a supporting character. He might be initially suspicious of Draco living with Sirius but then come to understand the situation. Hermione could also be there, trying to help Draco with his studies and also guiding him morally. Ron would probably be the one with the most doubts, but his loyalty to Harry and Sirius might make him tolerate Draco's presence. Lupin could be another supporting character, as he is a friend of Sirius and could offer his wisdom in dealing with Draco.
The main characters are Harry and Tsuna. Harry, who has a complex past and a strong sense of justice, decides to take Tsuna into his care. Tsuna, on the other hand, is a character with his own unique personality. He is not very confident initially but has hidden strength. Along with them, we might also see other characters like Dumbledore in Harry's world, who could support Harry in his decision to adopt Tsuna, and characters from Tsuna's family and friends circle who could react to this new situation.
The main characters are Cedric and Harry. Cedric, a popular and talented student at Hogwarts, decides to take Harry under his wing. Harry, who has had a tough life so far, now has to adjust to living with Cedric. There could also be minor characters that are important for the story, such as Cedric's professors who might notice the change in Cedric's behavior due to his new responsibility of taking care of Harry, or Harry's enemies who might be more cautious now that Harry is under Cedric's protection.
The main characters are Harry and Ginny. Harry is the one who makes the decision to adopt Ginny. He is the more experienced and well - known wizard. Ginny, who has been through her own share of adventures at Hogwarts, now becomes Harry's adopted daughter. There might also be other supporting characters like Hermione and Ron, who could be involved in the story, either helping Harry with the adoption process or being there for Ginny during this new phase of her life.
The main characters are Gibbs, who is a no - nonsense kind of guy from the NCIS world, and Harry. Harry is not just a normal kid but a wizard with a past full of battles against evil. There could also be other supporting characters from the NCIS team, like DiNozzo, who might be initially skeptical about Harry's magic but later become friends with him.
Harry could be the same Harry Potter we know from the books, a brave and kind - hearted wizard. Kara could be a character from another universe, perhaps with superhuman abilities like flying or super strength. Maybe she's an alien like Supergirl Kara, but in this fanfiction, she's in a situation where she needs to be adopted by Harry.
The two main characters are obviously Harry and Severus. Harry, the hero of the wizarding world, who has a big heart and a sense of justice. And Severus, the complex and often misunderstood former Death Eater and potions master.