When Harry turns into a dragon, his relationships with his friends would change significantly. At first, they would be shocked and perhaps a bit fearful. Hermione would jump into action, using her vast knowledge of magic to try and understand what happened. Ron would be more instinctive, trying to keep Harry calm. As time passed, they would have to adapt to this new situation. They would need to work together more closely, for example, when it came to finding food for Harry in his dragon form. Their bond would be tested as they faced the challenges of hiding Harry's transformation from the wizarding community and dealing with any threats that came with his new form.
Well, for Hermione, she would be very concerned about Harry's well - being. She'd likely see it as a complex magical problem to solve. Ron, on the other hand, would probably be excited in a way, but also realize the seriousness. Their friendship would become more about taking care of Harry. They would have to communicate in different ways, like Hermione might use spells to talk to the dragon - Harry. And they would have to be more careful in public, as Harry's dragon form could attract unwanted attention from the wrong people in the wizarding world.
His friends would be both amazed and a bit scared at first. Hermione would immediately start researching ways to turn him back. Ron might be more in awe of Harry's new form, but also worried about how dangerous it could be. Their dynamic would shift as they now have to protect Harry in a different way. They might also have to hide his transformation from others who could misunderstand and try to harm Harry.