Humor can be added through character quirks. Like Neville's clumsiness can be exaggerated in a funny way. For instance, he could accidentally trip over his own plant while trying to show it off in Herbology class. Also, using puns related to magic. For example, when someone says 'I'm so charmed, it must be the spell of good humor!'
One interesting example could be a fanfiction where Harry and Hermione are secretly in love and they have humorous banter during their study sessions in the library. Another might be a story where Ron tries to use his own brand of humor to win over Luna Lovegood romantically.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Harry Potter humor and romance' in their search bars.
One example could be a fanfic where Draco Malfoy constantly makes sarcastic remarks about Hogwarts' new rules. For instance, when they introduce a new dress code, he might say, 'Oh, because a different shade of robes will surely improve our spell - casting.' Another could be a story where Hermione uses her sarcasm to deal with Ron's silly ideas. Like when Ron suggests they use a spell he just made up to solve a problem, Hermione might reply, 'Yes, because your half - baked spells have always worked so well in the past.'
In some fanfictions, there are funny moments like when Hermione tries to teach the Weasley twins about advanced Muggle studies. The twins keep coming up with wild and wacky ideas about Muggle inventions, thinking a toaster is some sort of magical device for communicating with the dead. Their misunderstandings and Hermione's exasperated reactions are really humorous.
In fanfiction, Harry Potter's sense of humor often shows through his witty remarks during tense situations. For example, when facing a difficult spell in a made - up adventure, he might make a self - deprecating joke about his chances of getting it right. This not only lightens the mood but also shows his ability to not take himself too seriously, which is in line with his character in the original series.
Maybe it's a way of saying that the fanfiction takes the Harry Potter universe and injects it with a large dose of humor that's a bit mad. It could be that the author has a unique take on the characters and events, twisting them in a humorous way that might seem unexpected or even a bit zany to readers who are used to the normal portrayal of Harry Potter. For example, they might have the characters engage in absurd magical mishaps or have really wacky conversations that are different from what we see in the official books or movies.
Parody is another effective method. You can create a story that parodies the typical 'Harry Potter' plot. For example, instead of Voldemort being the big bad villain, it's a wizard who's obsessed with making everyone wear matching socks. The absurdity of such a change can be really funny. And when the heroes like Harry and his friends have to deal with this strange new 'threat', it can lead to all kinds of humorous situations.
There are fanfictions that humorously depict Hagrid's attempts at teaching Care of Magical Creatures. In some, he accidentally lets loose a group of Flobberworms that start acting like they're on a mission to take over the school. They slither into the classrooms and start eating students' homework, which creates a really comical situation as everyone tries to catch them.
The familiarity of the characters. We already know Harry, Hermione, and Ron so well. When we see them in humorous fanfictions, like Ron getting into all kinds of food - related mishaps that are played for laughs, it's both unexpected and fun because we have an established image of him. Also, the magic world has so many elements that can be twisted for humor, like spells going wrong in the funniest ways.