He would probably be more empathetic. Since Hestia is associated with the hearth and home, Harry would likely have a deep understanding of the importance of family and belonging. This could make him more sensitive to the feelings of others, especially those who have lost their homes or families.
He'd probably be more calm. Hestia's influence would likely make him less likely to jump into dangerous situations without thinking. He'd have a different view of family and might be more inclusive towards others, seeing them as part of his extended family.
Harry's character would undergo a significant transformation. At first, he'd be in disbelief about being the son of Raiden. But as he accepts it, he'd start to embody some of Raiden's traits. Raiden is known for his determination and justice - seeking nature. Harry would become more of a force for justice not just in the wizarding world but potentially in other realms as well. He'd also have to learn to balance his wizarding side with his new divine heritage. This would involve a lot of self - discovery and growth, as he figures out how to use his new powers and identity for good while still being the Harry Potter his friends know and love.
He'd likely become more confident in new ways. Growing up with superheroes would expose him to different forms of courage. He might be less hesitant to take risks.
Harry's character would likely become more conflicted. He'd have to deal with the dark impulses from his Darkseid heritage while still holding onto his values from the wizarding world.
Harry would likely grow to be more powerful in terms of magic. He'd start to incorporate Zeus - like abilities into his fighting style. For instance, instead of just using his wand for spells, he could call lightning from the sky. His relationships with his friends would also change. They might be in awe of his new powers, or some might be jealous. This would force Harry to re - evaluate his friendships and become more independent in his decision - making.
Obviously, Harry Potter himself is a main character. Since he is now the son of Hestia, his character development would be a central focus. He would be dealing with the implications of this new identity.
Harry's character might develop in a more morally ambiguous way. With the influence of Nyarlathotep, he may question the traditional good - bad dichotomy in the wizarding world. He could become more self - reliant as he realizes that his heritage sets him apart from others and he can't always rely on the same support systems.
Harry's character likely develops in a more complex way. He may become more confident as he realizes his powerful heritage. For example, he might be more assertive in making decisions rather than relying so much on others. He could also grow more independent, exploring magic on his own terms as the son of Chaos.
Harry's character might become more solemn. Knowing he is the son of Thanatos, he has to grapple with the heavy concept of death. This could make him more introspective and less reckless than in the original series.
Yes, there are likely some fanfictions out there with this concept. You can start by checking popular fanfiction websites like Fanfiction.net or Archive of Our Own. Just search for 'Harry is the son of Hestia' in their search bars.