Well, it could be really wild. Maybe Harry would grow up with a strict code of honor like the Yakuza have. He might be trained in martial arts instead of magic at first. And his view of the wizarding world would be very different, perhaps seeing it as just another 'organization' to deal with.
Since I haven't read this 'forced to live with a wolf like yakuza novel', I can only make some assumptions. It could be that the protagonist is forced into a situation where they have to live with this yakuza - type character. This might lead to a story full of tension, where the protagonist has to navigate the dangerous and unpredictable behavior of the 'wolf - like' yakuza. There could be a development of a strange relationship between them, perhaps starting from fear and gradually evolving into something more complex like mutual understanding or even a form of friendship against all odds.
The Yakuza games story portrays Yakuza culture in several ways. It shows their hierarchical structure. The higher - ups have great power and respect, and the lower - level members have to follow strict rules. Also, their sense of justice within their own world is depicted. They have their own way of dealing with disputes and traitors which is part of their unique culture.
Since we don't have detailed information about this 'forced to live with a wolf like yakuza novel', we can only speculate. The main character is probably the one who is in the situation of being forced to live with the yakuza - like person. This character could be an ordinary person, perhaps a civilian who gets caught up in some sort of yakuza - related business. The 'wolf - like yakuza' is surely another main character. He might be portrayed as a powerful, menacing figure with his own motives and backstory. There could also be other characters such as a mentor - like figure for the forced character, or an enemy within the yakuza organization that adds more layers to the story.
One of the best yakuza stories is about loyalty within the yakuza clans. For example, there are tales of yakuza members who would sacrifice themselves to protect their bosses. They consider honor and loyalty above all else, and these stories often show how they adhere to a strict code of conduct even in the face of danger.