He could be determined to fulfill Sirius's wishes. If Sirius left something important for him to do, like protecting certain people or places, Harry would be resolute in doing it. He would see it as a way to honor Sirius's memory and also as his duty as Sirius's heir in a way. Harry would probably also feel a deeper connection to Sirius, realizing how much Sirius cared about him even in death.
At first, Harry might be a bit confused. He might not understand all the implications of what Sirius has left in the will. But as he reads through it and has it explained to him (perhaps by Dumbledore or Hermione), he starts to feel a sense of purpose. He realizes that Sirius's will is not just about material things but also about the values and tasks that Sirius wanted him to uphold. This could be a turning point for Harry in his fight against Voldemort, giving him new motivation and a new perspective on his role in the wizarding world.
Harry might be initially shocked. He could feel a mix of sadness and a sense of responsibility. After all, Sirius was like a father figure to him.
Sirius would likely be extremely angry. He already has a protective streak towards Harry. He might immediately confront those he suspects of the abuse, whether it's the Dursleys or others at Hogwarts. He would probably also try to remove Harry from the situation as quickly as possible.
Sirius would probably be very worried and immediately try to help Harry. He might use some basic healing spells he knows.
Maybe Sirius left his possessions to Harry. His beloved motorcycle could be bequeathed to Harry, as it was something very special to him and also had a connection to Harry's escape from the Dursleys in the past.
As time goes on, Harry could start to explore what it means to 'please' Sirius. He might recall their past relationship, the things Sirius likes and dislikes, and try to use that knowledge to his advantage. He may also feel a sense of loyalty towards Sirius that, despite the odd circumstances, makes him more accepting of the situation. For example, he might remember Sirius' love for adventure and try to engage in some magical adventures with him in a way that 'pleases' him.
Harry may also feel a sense of adventure. Despite the situation, he's used to facing strange and dangerous things. He might start to think about how he can use this situation to his advantage, like finding out more about his parents or the secrets of the wizarding world that Sirius might know. He could be a bit excited as well as scared. For example, he might be thinking that this could be a chance to get away from the Dursleys for good.
The 'Harry Potter' books are set in a magical world full of its own stories, prophecies, and secrets. Sirius is a complex character with a lot on his plate. He has to deal with his family history, his time in Azkaban, and his loyalty to his friends. Fanfiction is a form of creative writing by fans outside the original story. Sirius doesn't have the time or the inclination within the context of the story to be reading fanfiction. His life is too filled with real magical drama and danger.
Sirius would probably be overjoyed at first. Harry is his godson and he cares deeply for him.
It could lead to a very different dynamic. Harry might have grown up with more freedom and a stronger sense of family.
In the Harry Potter series, the female protagonist was Ginny Weasley (later Ginny Potter), Sirius Black was Harry Potter's godfather, and Sirius's sister was not the female protagonist. Ginny Weasley had three children with Harry Potter, and she played an important role in the story, participating in many story developments and magical events from Harry's time at Hogwarts. Harry Potter and the Chamber of Secrets is not enough. Everyone is welcome to click to read the novel!
Sirius would probably be shocked at first. Then, he'd likely feel a deep sense of sadness and guilt. He might think that he should have been there more to protect Harry from getting those scars.