I'm not sure exactly. You might have to read or watch the story closely to find out.
A wizard who has dabbled in the Muggle world might give Harry a gun. This wizard could have seen the potential use of a Muggle weapon in the wizarding world's dangerous situations.
Often, it could be Dumbledore. He is a very authoritative figure in Harry's life and in the wizarding world in general. His orders usually carry great significance and often involve tasks related to the fight against Voldemort or the discovery of important magical secrets.
I'm not sure specifically as I haven't watched it directly. But generally, it might be about ghost guns which are often privately made firearms that lack serial numbers and are difficult to trace. It could cover aspects like how they are made, who is making them, and the potential implications for law enforcement and public safety.
Yes, it could be. The title 'the old man and the gun a ghost story' gives an impression of a spooky tale. If it is a movie, the 'ghost story' part might imply elements of the supernatural, and an old man with a gun in such a context can add to the mystery and potentially horror - like if he's a haunted figure or involved in some otherworldly events.
Obviously, Harry and Draco are the main ones. Harry, with his kind heart and strong magic, and Draco, who has his own complex personality. Their relationship in this fanfiction is the focus, and the act of Harry giving Draco a hickey is something that will shape their interactions and the story around them.
His friends like Hermione and Ron could also be important characters. Hermione might use her intelligence to help Harry during the pregnancy and after the birth, while Ron could provide some comical relief with his typical reactions.
The main characters are obviously Harry and Teddy. Harry Potter, the famous wizard who defeated Voldemort, and Teddy Lupin, the son of Remus Lupin and Nymphadora Tonks. Harry is likely in a mentoring role here, while Teddy is the recipient of whatever knowledge or advice Harry is giving.
It could be some other wizard who Harry had an unexpected encounter with. Maybe it was a wizard who was secretly in love with Harry and used some sort of love - related magic that had an unforeseen consequence.
It could be that the father is an unknown wizard who Harry had a brief encounter with. Maybe it was a one - time magical connection that led to the pregnancy.
Obviously, Harry would be the main character. But there could also be other characters involved in the events leading up to him having to give himself stitches. For example, his friends like Ron and Hermione might have been there before and left him in a situation where he got injured.