The tracer abilities in the fanfiction might be described as an extension of Harry's existing magical skills. Given his natural talent and his connection to powerful magic (like his defeat of Voldemort), these tracer abilities could be a new manifestation. Maybe he can trace not only spells but also the intentions behind them. So if someone has cast a spell with ill intent, he can follow that intention's 'trace' through the magical environment. It could be a very useful ability in his adventures, whether in Hogwarts or in the wider wizarding world.
Since there's not much information, Randy could be just a fictional character in a Christmas - related story someone made up on the spot. It might be a name given to a character who was being annoying during the story, so they were told to shut up.
Well, without having read 'Randy writes a novel' in detail, it's really difficult to determine the voice behind Randy. It could be that the author has intentionally left it ambiguous. However, if it's a story with an audiobook version, it might be a voice actor who was chosen for their ability to bring Randy to life. They might have a particular accent or tone that the producers thought would match the character's personality. For example, if Randy is a gruff, no - nonsense type of character, they might have chosen a voice actor with a deep, raspy voice.
Ralphie and Randy are likely characters in a Christmas - themed story. They could be brothers or friends. Usually, in Christmas stories, characters like them are kids who are excited about the holiday season.
I don't really know who Randy Randy is specifically. Maybe he's just a fictional name or a relatively unknown writer. As for the novel he writes, without more context, it could be about anything - it could be a love story, an adventure, or a mystery.
Skip Westcott could be an ordinary person who just happens to cross paths with the Avengers. Maybe he has a heart of gold and some hidden courage that the Avengers recognize.
One possible story could be about a little rabbit in the Tracer TF world. The rabbit has the unique ability to move extremely fast, just like Tracer. It uses this speed to outwit a fox that is trying to catch it. Every time the fox gets close, the rabbit zips away, leaving the fox confused and frustrated.
I'm not sure who Randy Roth specifically is without more context. There could be many people named Randy Roth. He could be an ordinary individual, a local figure in a certain community, or perhaps someone known in a specific field like business, arts or sports.