Perhaps he is trying to hide his true self. He may have a side of him that he doesn't want others to discover, like some special abilities or a different origin. So, being cold to everyone helps him keep his secrets and avoid getting too close to people who might figure him out.
I recommend 'The Cold - Hearted Harry'. It's a short but engaging fanfiction. Harry in this is cold because he has been betrayed too many times. It has a unique plot where Harry has to work with his enemies while still maintaining his cold exterior.
Cold emotionless Harry fanfictions often explore the idea of how much the character has been through to become this way. In many of these stories, it could be because of the loss of his loved ones or the constant battle against the dark forces. They usually have a theme of redemption or a slow thawing of his emotions as the story progresses. For example, in 'Frozen Hearts', Hermione tries to break through Harry's cold facade, which leads to some really heart - warming moments.
One great 'Harry Cold' fanfiction is 'The Adventures of Harry Cold'. It has an interesting plot where Harry Cold discovers a hidden magical world within the normal wizarding world. The characters are well - developed, and the writing style is engaging.
It could be due to a spell. There are many dark spells in the wizarding world that might cause a person to feel cold. For example, some curses can drain the warmth from a body. If Harry was targeted by such a spell, he would be cold. Also, it might be related to his emotional state. If he was feeling lonely or scared, it could make him feel cold inside, just like when people are in a bad mood in real life, they might feel colder than usual.
One way could be through persistent kindness. If they keep showing him genuine care and kindness without expecting anything in return, over time, he might start to open up.
One possible fanfiction could be that Harry tries to hide his chest cold from his friends at Hogwarts. He doesn't want them to worry, so he pretends to be fine during classes and Quidditch practice. But as the cold gets worse, his performance starts to suffer, and his friends start to suspect something is wrong.
I don't think so. Harry Potter is known for his courage, loyalty and compassion in the official story. While fanfiction can explore different interpretations, making him cold - hearted goes against the essence of the character that most fans are familiar with. So it's not likely to be a common theme in fanfiction.
Well, perhaps the plot could involve Harry being an outcast in Ravenclaw. His cold demeanor might make it difficult for him to make friends. He could be more focused on academic pursuits, using his intelligence to solve the mysteries around Hogwarts in a more solitary way, without relying on others as much as he did in the original story.
Another common theme is Harry Cold's adventures in different magical realms. Writers often create new and exciting places for him to explore, filled with unique creatures and magic. This allows for a lot of creativity and world - building in the fanfictions.