One interesting crossover could be Stewie from Family Guy getting his hands on a Harry Potter wand and causing chaos at Hogwarts. He might use his advanced intellect to try and outwit the wizards and witches there.
A more complex plot could be that the entire Family Guy cast gets transported to Hogwarts during a school year. Quagmire could be the new Defense Against the Dark Arts teacher, bringing his own unique brand of 'defense' which mostly involves flirting with the female students. Lois could get into trouble for trying to organize a Muggle - style PTA at Hogwarts, and Peter could end up on the Quidditch team as an accidental addition.
Meg from Family Guy is often the outcast. In a Harry Potter - inspired setting, she could be a Squib who discovers she has some unique magical ability that has been overlooked. She could then struggle to find her place among the magical community, much like she does in her own family in Family Guy. This would give her a chance to shine and develop her character in new ways.
They could be just ordinary wizards who happened to cross paths with Harry Potter. Maybe they have a special interest in orphans or in Harry specifically because of his unique situation as the boy who survived Voldemort's attack.
Professor Snape is a complicated character in the Harry Potter movies. He has both a good and a bad side.
In the original novel, Professor Snape was an anti-hero. He betrayed Voldemort for Lily's eyes and became a professor at Hogwarts, protecting Harry and the others. Although his behavior was greatly condemned, his love and loyalty to Lily were still important traits.
In the movie version, Professor Snape's image was adapted to be very negative. He was portrayed in the movie as a cruel, selfish, cunning and dark person. He betrayed Lily and tried to kill Harry in order to get the Soul Gem, which made him an extremely dangerous villain.
Therefore, it can be said that Professor Snape is a bad person in the movie version, and his behavior and character have led him to become a condemned character. However, his love and loyalty to Lily was still an important characteristic of his, and it was also something that made him worthy of respect.
I think Stewie would be really interesting. His evil - genius baby persona would contrast greatly with the magical world of Harry Potter. He could either be a major threat, trying to take over Hogwarts with his advanced technology (for a baby), or he could end up being a surprisingly good ally, using his wits to outsmart Voldemort.
He could be looking for different perspectives. Fanfiction often has unique takes on the characters and events. For instance, some fanfictions might focus on the backstories of minor characters like Neville's family history in more detail. So, it gives him a chance to see the wizarding world from different angles.
A 'harry potter science guy fanfic' could be a fan - made story that combines the magical world of Harry Potter with the idea of a science - guy character. It might involve the science guy using scientific knowledge in the wizarding world, like using physics to understand how magic spells work or using chemistry to create new potions in a more scientific way.
Well, in fanfiction, Harry might be seen as the hottest because of his heroic deeds. He's the Boy Who Lived, and that makes him super appealing. His courage in facing Voldemort time and time again gives him an air of mystery and strength, which are very attractive qualities.
I don't think I've heard of an episode specifically titled 'Family Guy Canadian Horror Story'. However, Family Guy often does episodes that involve travel and horror - like elements, so it's possible that it could be a fan - named or proposed episode idea rather than an official one.