It could change his relationships. If the device has some unique function like showing a person's true intentions, it might make Harry more cautious about who he trusts. On the other hand, it could also help him strengthen his bonds with his true friends. For instance, if it can record and replay memories, he could share more intimate and important moments with Ron and Hermione, deepening their friendship even further.
It could be a magical time - traveling device. Maybe it allows Harry to go back in time to change certain events in the wizarding world, like preventing some of Voldemort's early atrocities.
His life might become more self - contained. He'd have to rely more on himself without the big support system of Hogwarts. He might become more resourceful, like finding new ways to cook with limited space and resources in the tiny house.
His life would change drastically. He'd have to balance learning about chakra with his regular Hogwarts studies. His relationships with his friends might shift as they react to his new power. And he'd be more in - demand for fighting against dark forces, as he'd have an extra edge with chakra.
When Harry Potter becomes part phoenix in fanfiction, his relationship with the magical world around him would shift. He could communicate with other phoenixes in a way normal wizards can't. This would give him access to knowledge and secrets that are hidden from others. Also, his role in the wizarding community would become more special. People would look at him not just as the boy who lived, but as a unique being with the powers of a phoenix. He might be seen as a symbol of hope and renewal, much like the phoenix itself.
His daily routine would be completely different. Instead of going to classes like Potions and Transfiguration, he'd be in Math and History classes. He might feel bored at times because he's used to the more exciting and magical learning at Hogwarts.
It could change his life by giving him a new form of magic. For example, he might be able to combine the power of the stand with his existing magic, making his spells more powerful.
The phoenix could give Harry a sense of purpose. Knowing he has such a powerful and magical creature by his side, he might feel more confident. For instance, he could be more daring in his adventures and face his enemies without as much fear.
When Harry moves to America in fanfic, his social life is completely transformed. He is introduced to a whole new set of magical families and individuals. His status as 'the boy who lived' might not carry the same weight, or it could be even more of a novelty. He might have to learn new spells that are more common in America. His daily routine would be different, from the food he eats to the way he travels around the magical areas. And his view of the wizarding world would expand as he discovers the unique aspects of the American magical society.
His focus would shift from just magic and wizardry to also include the world of animations. He'd probably be constantly thinking about the next animation he wants to watch.
His view of heroism would change. Hellboy is a very different kind of hero compared to the wizards in Harry's world. He's more of a brawler and has a darker, more gritty approach to fighting evil.