Who could be the main characters in a 'Harry Potter raised guard for the queen' fanfic other than Harry?

Another character could be a cologne - making elf. In the wizarding world, there could be elves who specialize in making colognes. This elf could have a special bond with Harry. It could be that the elf was tasked with making a special cologne for Harry's protection from the moment he was born. And as Harry grows, the elf helps him understand the true power of the colognes he has been surrounded with all his life.

A magical creature native to China could be a main character. Maybe a phoenix - like being but with unique Chinese characteristics. It could communicate with Harry Potter in some way and help him on his journey. It could have powers that are different from the magical creatures Harry is used to in the UK, and they could form an unlikely bond as they face the mysteries together.

Ron and Hermione would surely be there. Ron might be a bit hesitant at first about Harry raising a dragon, but he would come around to help. Hermione would use her vast knowledge of magic and creatures to assist Harry in taking care of the dragon.

One possible plot is that Harry, after the defeat of Voldemort, is looking for a new purpose. When he hears about threats to the queen, he decides to offer his services. He first has to convince the royal family and the normal guards that his magic can be an asset. He then starts to raise a special guard unit of wizards and witches. They would have to learn to work with the muggle security systems. Harry would teach them spells for protection, detection, and emergency response. Along the way, they might face challenges from within the wizarding world who think they shouldn't interfere with muggle royalty, but Harry would be determined to keep the queen safe.

Obviously, Harry Potter himself would be a main character. He has the experience and the leadership skills from his battles against Voldemort. Hermione Granger would also be important as she has the knowledge and intelligence to come up with strategies for using magic for the country. Ron Weasley could be there too, providing the loyalty and the comic relief. And perhaps some new characters from the Muggle government side who interact with the wizarding world characters.

Hermione could be one. She might follow Harry to America to continue their adventures together. She could help Harry adjust to the new place with her intelligence and knowledge.

There could be the mob boss who takes Harry under his wing. This boss would be a key figure, teaching Harry the ropes and acting as a sort of father figure. Maybe there's also a rival mob member who becomes an antagonist in Harry's story.

Hermione could be one of the main characters. She would be very helpful with all her knowledge of spells and magic theory. She could assist Harry in planning the layout of the village and ensuring that everything is in order.

Ron could also be in it. He might initially not believe that Harry is hiding his intelligence, but as the story progresses, he could start to notice little things that Harry does which show his real intelligence. Ron's loyalty to Harry would then play a role in how he reacts to this discovery, either helping Harry keep it a secret or getting frustrated with Harry for not sharing his intelligence more freely.

Hermione could be one. She might come to the forest to check on Harry and end up staying to study the unique flora and fauna which have magical properties. Another could be Hagrid. He loves all kinds of creatures and the forest is full of them, so he could visit Harry often and bring him supplies.