At first, the elves might be a bit cautious in their interaction. But as they get to know the girl better, they become more open. They could teach her elven languages and magic spells. In return, the girl might introduce some human ideas and games to the elves. This exchange of cultures makes their relationship more interesting and complex.
In many fictions, elves are initially cautious when interacting with humans. They might keep their distance because they see humans as clumsy or too different from them in nature.
In a Christmas story, Santa's elves are usually busy making toys for children. They work hard to ensure there are enough gifts for everyone on Christmas Day.
Elves play many important roles. They are Santa's helpers. They make toys in the workshop. For example, they carve wooden toys, sew plush dolls, and assemble mechanical toys. They also take care of the reindeer and keep the North Pole organized for Christmas.
There might be a young and adventurous elf who becomes Harry's friend. This elf could be named something like Lyra. She could show Harry all the secret places in the elven territory and introduce him to other elves. There could also be a powerful elf leader, perhaps named Thranduil, who at first is suspicious of Harry but later comes to respect him.