His friends could help. For instance, Hermione might use her vast knowledge of magic to find the best spells for the garden's growth. Ron could offer his brute strength to move heavy things around the garden like large rocks or pots.
An old gardener in the wizarding world who has years of experience might take Harry under his wing. This gardener could teach Harry ancient gardening techniques that are passed down through generations in the magical community, which would be crucial in making the garden truly beautiful.
Neville could be another helper. He has become quite skilled in herbology. He could help Harry by creating a magical garden around the house. The plants in the garden could be used for protection, like thorny bushes that keep unwanted visitors away, or for providing ingredients for household potions.
Dumbledore might help from beyond the grave, in a sense. Harry could discover some of Dumbledore's old notes or memories that provide crucial insights into building a powerful and controlled bomb. And perhaps some of the more eccentric professors at Hogwarts, like Professor Flitwick, could offer their expertise in charms which might be needed for the bomb's construction.
Hermione would be a likely helper. She's always full of knowledge. She could research about simulacrums in the library and find some old spells or precautions that Harry should take while creating or handling it.
Dumbledore, even if not in person, could have left behind some clues or resources that help Harry. Also, the Order of the Phoenix members who are still around and believe in Harry's cause. They have their own skills and connections that could prove useful. For example, Moody could teach Harry some advanced defensive magic techniques to use against the Ministry's security measures.
Dumbledore could play a role too. He has vast knowledge and connections. He might give Harry some hints or direct him to certain places or people who can assist in finding the cure for lycanthropy.
His friends, Hermione and Ron, would surely be there to help. Hermione with her vast knowledge of magic and Ron with his loyalty and strength.
Hermione might help Harry. She's always good at giving advice on how to handle social situations. She could tell Harry exactly what to say to Parvati to make his apology sincere and effective.
Maybe Hagrid could help. He has a great love for magical creatures and might know of some special materials or spells that could be used in boat - building. He could also provide the physical strength needed to move heavy parts of the boat during construction. Also, Neville could be involved. He has grown a lot in his magical abilities and might contribute some unique plant - based magic to the boat - building process, like using magical vines to hold the boat together.
Dumbledore, if he were still alive in the fanfiction, could offer his wisdom. He might guide Harry on the moral and magical implications of creating an island. He could also provide some powerful spells or artifacts that would aid in the construction process.
I think Hagrid could play a role. He has a lot of knowledge about strange and magical creatures and objects. He might be able to provide some unique materials for the spaceship, like the feathers of a magical bird that could be used for insulation or a special type of wood that has magical properties for the ship's frame. Also, Luna Lovegood might offer some out - of - the - box ideas. Her unique perspective on magic could lead to innovative solutions for the spaceship's design or propulsion.