His relationship with his sister would likely become more complex. She might be both in awe and a bit scared of his new Phoenix nature. He could be more protective of her, like a Phoenix guarding its nest. With other characters, some might be drawn to his power and new - found abilities, while others could be suspicious or jealous.
Well, considering his Phoenix nature in the fanfiction, it could have a significant impact on his relationships. For starters, his friends might view him as a source of great power and protection. They would rely on him more, which could strain some relationships if he's not careful. His family relationships, especially with his sister, would be transformed. She might look at him with a new sense of wonder and respect. Enemies, on the other hand, would either target him more or try to manipulate his Phoenix powers for their own gain. All in all, his relationships would be in a state of flux due to this new aspect of his character.
The plot might involve the brother's transformation into a Phoenix - like form in the fanfiction. This could be a result of some magical event or a hidden heritage. As a Phoenix, he would have to deal with the new responsibilities and powers. He could face challenges from other supernatural beings who either fear or envy his new form, all while trying to keep his sister safe and uphold the values of the Lost Girl world.
With Ron, it could be a bit more comical. Ron might be a bit jealous of Harry's cool new form at first, but then he would realize how useful Harry's phoenix abilities are. For example, Harry could use his phoenix tears to heal Ron when he gets injured in their adventures. Their friendship would still be strong, but with a new dynamic.
It could make Hermione more confident. Knowing she has an older brother might give her a sense of security, so she could be more assertive in her friendships. For example, she might be more likely to stand up to Ron when they have an argument, because she has that family support in the back of her mind.
Well, in many fanfictions, the bond with a phoenix can enhance Harry's magical abilities. The phoenix is a very powerful magical creature. Its magic might seep into Harry, making his spells stronger. For example, his Patronus could become more powerful as the phoenix represents hope and renewal, which are strong elements in Patronus magic.
His presence could make Harry more protective. Harry might be more cautious in his adventures, not wanting to put his little brother in danger. For example, when dealing with the Marauder's Map, he might be more hesitant to use it if he thinks it could expose his brother to trouble. Also, his friends like Ron and Hermione would have to adjust to having a younger, perhaps more inexperienced, person around. They might feel responsible for him as well.
The Ghost Phoenix could be developed by giving it a unique personality. For example, it could be a very proud and noble being, with a sense of honor that guides its actions.
In terms of his relationships with his Slytherin peers, some might look down on him. But others could be intrigued. Pansy Parkinson, for example, might see Draco as a girl as a threat to her status as the 'queen bee' in Slytherin. However, some of the more open - minded Slytherins could befriend Draco and help her deal with the challenges of being a girl in a very traditional and often misogynistic wizarding society.
His overprotectiveness towards his sibling might make his friends a bit cautious. They might not want to involve Naruto's sibling in any dangerous missions or activities for fear of angering Naruto. For example, Kakashi might be more hesitant to let Naruto's sibling go on a mission with the team.
In some fanfictions, Naruto's half - kitsune nature makes him more alluring to some characters. For example, Hinata might be more drawn to him because of his unique and somewhat mysterious nature. His friends, on the other hand, might be initially wary but then come to accept and even admire his new powers.
It can make his relationships more intense. For example, in his friendships, he might be overly eager for hugs or physical contact from his friends like Sasuke or Sakura. This could initially surprise them but then lead to a deeper bond as they understand his need. In romantic relationships in the fanfiction, his touch - starved nature might make him more clingy at first, but also very loving and devoted once he feels secure in the relationship.