In terms of romantic relationships, it could add an interesting dynamic. Her love interest might be initially attracted to her because of her unique ability, or it could cause some jealousy if she uses her powers to get close to others in disguise. For example, if she changes into someone else to gather information and her love interest misinterprets it.
Her relationship with her enemies could be very different too. They might fear her ability and try to find ways to neutralize it. This could lead to some intense confrontations where she has to use her wits as well as her powers to outsmart them. Also, she could use her Metamorphmagus skills to play mind games with her foes, making them constantly on edge about who she really is.
It might make her more mysterious to her friends at first. They could be both intrigued and a little bit wary of her ability to change her appearance. But as they get to know her better, they come to accept and even rely on it in some cases.
In fanfiction, her Metamorphmagus ability can have a great impact on her relationships. If she's in a romantic relationship, her partner might have to learn to love all her forms, which could be a test of true love. With her enemies, they might be constantly on edge not knowing which form she'll take next. And with her teachers, they may be both impressed and a bit wary of her power, which would affect how they interact with her in the classroom and outside.
It could strengthen her relationship with Hermione. Hermione, being intelligent and open - minded, would likely support Fem Harry's singing career. She might help Fem Harry with managing her schedule, just as she helps with academic work in the original series. And they could bond over the new experiences that come with Fem Harry's fame as a singer.
Well, her use of blood magic in fanfiction could have a huge impact on her relationships. Firstly, her closest friends like Hermione and Ron would probably feel betrayed. They've always been on the side of good magic, and blood magic is considered a very dark and dangerous form. This could lead to arguments and a breakdown in their friendship. Secondly, her relationships with other students might change. Some might be afraid of her newfound power and the means she used to get it. Others might be intrigued and want to follow her lead, which could also cause problems. And her relationship with Dumbledore or other authority figures in the wizarding world would be severely tested as they try to bring her back from what they see as a dangerous path.
Well, if fem Harry is older, it might change her relationships a great deal. For example, in her friendship with Ron and Hermione. She could be more of a mentor figure to them rather than just a peer. Older fem Harry might have a more mature outlook, which could lead to some initial friction as her friends might not be used to this new dynamic.
If Fem Harry has Veela inheritance, it can make her relationships more complex. Her charm might attract unwanted attention, causing jealousy among friends or potential love interests. In the case of werewolf inheritance, she may fear hurting those close to her, which could put a strain on relationships. On the other hand, if she has phoenix inheritance, her ability to heal might strengthen her bonds as she can help those she cares about.
One interesting storyline could be Fem Harry using her Metamorphmagus abilities to infiltrate the Death Eaters. She could change her appearance to spy on them and gather crucial information for the Order of the Phoenix. Another could be her using it to blend in at Hogwarts when she wants to avoid unwanted attention, like when the press is hounding her. Or perhaps she uses it to help her friends in unique ways, such as changing into a form that can access a locked room to retrieve a lost item.
One interesting plotline could be her using her Metamorphmagus ability to blend in different situations at Hogwarts. For example, she might change her appearance to spy on the Slytherins when they are planning something devious.
In this fanfiction scenario, Harry's relationship with Dumbledore could be very interesting. Dumbledore would surely be aware of the significance of Excalibur. He might take Harry under his wing even more, guiding him on how to use the sword's power for good. Harry's relationship with the other Hogwarts students could also change. Some might look up to him even more, while others might fear him because of the great power he now wields.
If Harry is sleepwalking, it might worry his friends. For example, Hermione would probably be very concerned and try to find a way to stop it. This could strengthen their friendship as she devotes time to helping him. Ron, on the other hand, might initially find it funny but then also realize the seriousness. It could also make some of his classmates more curious about him, which could either bring them closer or create some distance depending on how they react to his sleepwalking episodes.
It might make his relationships more interesting. If he reads fanfiction that has unique takes on his friendships, like a story that shows a deeper bond between him and Hermione, he could be more conscious of those relationships in real life and try to strengthen them further.