Well, his tail in fanfiction could be a sign of vulnerability too. Writers might use it as a way to show his softer side. For example, if someone were to grab his tail, it could make him feel really uncomfortable or even weak. It could also be a way for him to show affection in a non - human way, like wagging it when he's happy around Kagome.
In some fanfictions, Inuyasha's tail could be a magical object. It might hold secrets or memories from his past. There could be spells or curses associated with it. Writers could create interesting plotlines where his tail is the key to unlocking a hidden power or a long - forgotten mystery about his heritage. It could also be a way for other characters to manipulate him, by threatening or using his tail in some way.
His relationship with other demons could be affected too. They might see his tail as a sign of his strength or weakness. Some demons might be envious of his tail if it has special powers. Others might try to use it against him in battles or to gain some advantage over him. It could also be a way for Inuyasha to bond with other half - demons who also have unique physical features like a tail.
One common theme is the clash of different power systems. Inuyasha has his demon powers and sword skills, while Fairy Tail has magic. So, in many fanfictions, they explore how these powers interact, like whether Inuyasha's Tessaiga can cut through Fairy Tail's magic barriers.
The forked tail cat in Inuyasha was a fictional creature that did not exist in the real world. The image of a forked tail cat was very popular in Inuyasha's world view, so there were many derivative works such as manga, animation, games, etc. Although the Fork Tail Cat is not a real creature, they played an important role in Inuyasha's story and were loved by readers.
Another reason might be revenge. There could be a character who has a grudge against Inuyasha or someone close to him. So, they kidnap him to make him suffer or to use him as bait to draw out his friends. For example, if there was a demon whose family was slain by Inuyasha in the past, they might kidnap him for revenge.
Another interesting piece of 'Inuyasha Fairy Tail crossover fanfiction' is the one that focuses on a team - up between Inuyasha and Natsu. They go on a quest together, with Inuyasha's tough exterior and Natsu's fiery personality. Their interactions are really fun to read, like when they argue about who's the stronger fighter or when they have to combine their powers to defeat a powerful enemy.
Perhaps in this fanfiction, the tail is a result of an experiment gone wrong. Dipper is always getting into strange situations in Gravity Falls. He might have been trying to figure out some mystery and ended up with a tail as an unexpected consequence. This could then lead to humorous or dangerous situations as he tries to hide it from Mabel and the others, while also trying to find a way to reverse it.
One way could be through self - sacrifice. If Inuyasha were to put himself in great danger to save Kagome from an even greater threat, it would show his true feelings for her. He could also openly admit his mistakes and beg for forgiveness, vowing to never let his past feelings for Kikyo cloud his judgment again.
Well, in some fanfictions, Inuyasha might hurt Kagome's feelings by being overly possessive. For example, he could get jealous when Kagome talks to other male characters and then say something harsh. Another way could be that he doesn't trust Kagome's judgment at times, like when she tries to come up with a plan to deal with a demon and he dismisses it rudely, making her feel unappreciated.
Well, in Dragon Ball lore, Gohan's tail was a Saiyan trait. In this fanfiction, it might mean he has more access to his Saiyan instincts. Maybe he can transform more easily into a Great Ape or use some of the primal Saiyan powers that were associated with the tail.
In fanfiction, the baby could be the key to unlocking some long - lost secrets in the Inuyasha universe. Since Sesshomaru and Inuyasha have such complex histories and lineages, the baby might hold the answers to ancient prophecies. It could also have a special bond with the Jewel of Four Souls, perhaps having a unique way of controlling or protecting it that neither of its parents had. And of course, there would be all kinds of emotional drama as the two brothers - turned - co - parents deal with their new relationship.