Another way Daphne could be protective is by helping Harry with his studies when she notices he's struggling. In the wizarding world, academic performance can be crucial for one's safety and future. If Daphne sees Harry having a hard time with a particular subject like Potions, she offers to tutor him, which is a form of protection in a way as it helps him avoid potential problems in school.
She might stand up for Harry when others are bullying him at Hogwarts. For instance, if some Slytherins are taunting Harry about being a Gryffindor, Daphne could step in and tell them to stop. This shows her protective side as she doesn't want Harry to be harassed.
One way could be through mental support. In certain fanfictions, the Kyuubi might communicate with Naruto in his mind during tough situations. It could give him advice or just boost his confidence, like saying 'Don't worry, brat. I won't let anything bad happen to you.' This is a form of protection as it helps Naruto face difficulties more bravely.
The relationship could also develop through cultural exchange. Daphne, being from a pure - blood Slytherin family, has different values and traditions compared to Harry. As they get to know each other, they introduce their respective cultures to one another. This leads to a deeper understanding and a more profound emotional connection between them.
In many such fanfics, Percy uses his intelligence. For example, he might study the laws and regulations of the wizarding world thoroughly to find loopholes that can protect Harry from unjust punishments or accusations.
In some fanfictions, their relationship develops through shared secrets. Daphne might share some Slytherin secrets with Harry, and in return, Harry tells her about his experiences with Voldemort. This sharing of personal and important information brings them closer together. They start to rely on each other more and more, and eventually, their relationship can range from a deep friendship to a romantic one, depending on the direction of the fanfiction.
One common scenario could be in a dangerous situation at Hogwarts, like when there's a dark magic threat. Cedric might step in front of Harry to shield him. Another could be during a Quidditch match where an opposing team is playing dirty, and Cedric ensures Harry is not targeted unfairly.
One reason could be that she has seen his courage and selflessness. Harry is known for his heroic deeds, and Daphne might admire these qualities and thus want to protect him. Just like how people often feel the need to protect those they look up to.
Anko might show protectiveness in the Naruto fanfiction by physically defending Naruto when he is in danger. For example, if Naruto is being attacked by enemies, Anko could jump in and use her skills to fend them off.
Well, before the pregnancy, they might have had a more carefree relationship. But once Daphne gets pregnant, it would be a turning point. Harry would become more protective of Daphne, and Daphne would start to see Harry in a new light, as a potential father. There would be a deeper level of intimacy as they share the experience of bringing new life into the world. They would also have to communicate more openly about their fears, hopes, and plans for the future.
It could develop into a strong friendship. Since they meet as babies, they grow up with a sense of familiarity. They might trust each other more than others and always be there for one another.
In the fanfiction, their relationship could develop in a rather unexpected way. Since they live together, they are constantly in each other's presence. Harry might start to teach Daphne some of his Quidditch moves in the backyard, and Daphne could introduce Harry to some of the more sophisticated Slytherin social etiquette. As they engage in these activities together, they start to respect and admire each other more. Eventually, this could lead to a romantic relationship or a very deep friendship depending on how the author wants to take the story.