One possible person could be Hermione Granger. She is Harry's best friend and has always been by his side, using her intelligence and magic skills to help him out of difficult situations, which is a form of protection.
Another potential protector could be Hagrid. He has a big heart and has been looking out for Harry since he first entered the wizarding world. Hagrid's strength and knowledge of the magical creatures could be used to safeguard Harry.
Perhaps Dumbledore as well. He is extremely powerful and wise. He has been guiding Harry and has often put measures in place to keep him safe, like leaving him with the Dursleys under the protection of his mother's blood magic.
Another plot point might be that the person protecting Harry has to sacrifice something precious in order to keep him safe. This could create a lot of emotional drama in the fanfic, as Harry may not want anyone to sacrifice for him.
In many fanfics, the members of Team 7 protecting Harry Potter can be quite diverse. Sometimes it might include some minor characters from the original books who are given more prominent roles, such as Luna Lovegood. There could also be characters from other houses in Hogwarts that band together. And, of course, as mentioned before, the author might introduce brand - new characters with unique magical abilities or traits to form this Team 7.
It really depends on the fanfic. Sometimes it could be Norbert, the dragon that Hagrid had. Since we already know about Norbert from the original books, it's easy for fanfic authors to bring him back as a protector. Another common one might be a wild dragon from the Forbidden Forest that has a special bond with Harry for some reason.
Well, in some fanfics, the dragons might be portrayed as fierce yet loyal guardians. They could use their size and fire - breathing abilities to scare off enemies. For example, they might circle around Harry, creating a ring of fire to keep the dark wizards at bay.
Well, perhaps he uses his magic skills. He could cast protective spells around the Starks' territory, like a powerful Fidelius Charm to keep their location secret from their enemies.
A snake could use its venom to attack enemies who try to harm Harry.
In fanfiction, Harry Potter could protect the Starks by using his magic skills. For example, he could cast protective spells around their territory to keep away enemies. His ability to apparate could also be useful in quickly getting the Starks out of dangerous situations.
Well, perhaps Harry uses his magic skills like the Shield Charm to protect Colin from various dark spells or dangerous creatures. For example, if there are Death Eaters around, Harry could quickly cast a Protego Maxima to form a large protective shield around Colin.
One way is to respect the original work's lore. When creating fanfic, make sure not to distort the core elements of the Harry Potter universe. For example, don't change the basic rules of magic like how spells work without a good reason. Also, always give credit to J.K. Rowling as the original creator. This shows respect for the intellectual property rights that underlie the Harry Potter franchise.
Hedwig could be a potential ally. She could carry messages to Harry's friends at Hogwarts, alerting them of his situation. Even though she is just an owl, she has shown loyalty and intelligence in the original series.