Harry could show Sirius - like humor by his way of teasing his friends in a good - natured way. Sirius used to tease Remus about his werewolf side in a friendly manner. So Harry might tease Ron about his fear of spiders or Hermione about her strict study habits, all while making it clear that it's just friendly banter, in the same vein as Sirius's humor.
Well, Harry might start making quick - witted remarks just like Sirius. Sirius was known for his sharp and often sarcastic humor. So Harry could be cracking jokes at the expense of the Slytherins or making light - hearted fun of Hogwarts' rules, similar to how Sirius used to do when he was a student.
He could be more defiant towards the authority figures he doesn't trust. Sirius was always a bit of a rebel against the Ministry when they were wrong. So Harry might openly question the decisions of some of the Hogwarts teachers or the Ministry officials who visit the school, if he feels they are being unjust, much like Sirius would have.
His relationship with Dumbledore could become more complex. Dumbledore knew Sirius well, and if Harry starts emulating Sirius' more impulsive side, Dumbledore might have to be more hands - on in guiding Harry. On the other hand, among the other Gryffindors, Harry could become a sort of leader figure. Since Sirius was a popular and respected Gryffindor in his time, Harry acting like him could inspire his housemates and lead to more group activities and a stronger sense of unity within Gryffindor.
One way Harry Potter might act like his mother in the fanfiction is through his nurturing side. His mother was a loving and caring person. So, Harry could be seen taking care of his friends when they are sick or in trouble. He might also be very inclusive, making sure that no one feels left out, similar to how his mother would have treated people around her. This could also be shown in his relationships with his Hogwarts classmates, where he goes out of his way to make everyone feel welcome and valued.
In the 'harry potter acts like tobi fanfiction', Harry Potter's behavior could change in several ways. Tobi is known for his ability to manipulate situations to his advantage. So, Harry might start using his knowledge and skills in a more calculating way. For example, he could be more strategic in his interactions with his friends and enemies alike. Instead of being straightforward, he might play mind games like Tobi does. He could also become more solitary, as Tobi often keeps to himself, and only reveals his true intentions when it suits him. This would be a significant departure from Harry's more open and honest nature in the original series.
Sirius helps Harry become more confident. By sharing his knowledge and experiences, Harry feels more capable. For example, when Sirius teaches Harry a difficult spell, Harry realizes he can master things he thought were out of his reach.
It could enhance their relationship if the fanfiction gives Harry new topics to talk about. For example, if the fanfiction is about a magical adventure similar to their own experiences, they can bond over it.
Sirius influences Harry's early life by being a protector. He stands as a shield against any potential threats. He might use his Patronus, a large dog, to guard Harry at night, making Harry feel safe in his sleep.
Sirius could help Harry cope by sharing his own experiences of being an outcast in his family. He could tell Harry that just because his parents did this horrible thing, it doesn't mean he's unlovable. Sirius could also introduce Harry to his friends in the wizarding world, like Remus, who could also offer support and friendship.
It's possible that in the cave, they start to see each other as equals rather than just a mentor - student relationship. They might argue about the best way to deal with the cave's mysteries at first, but through that process, they learn to value each other's perspectives. Also, if one of them gets injured in the cave, the care and concern shown by the other would enhance their relationship.
If Harry Potter acts like Aizen in the fanfiction, his demeanor would transform significantly. Aizen is known for his calm and collected exterior that masks his true, more devious nature. Harry might adopt this same facade. He could start to show a detached attitude towards his friends, using them as pawns in a larger scheme he has in mind. His actions would be more centered around achieving a long - term goal that he doesn't fully disclose to others, and he would be more willing to sacrifice short - term relationships for the sake of this grand plan.