Often, these fanfictions will show Stiles being able to quickly analyze situations. For example, in many stories, he can assess a dangerous situation involving supernatural beings and come up with a plan in seconds due to his high IQ.
One common theme is how his accent affects his relationships. For example, it might make him seem more mysterious or exotic to other characters, which can lead to new romantic interests.
It could be someone from Stiles' past that he had a brief relationship with. Maybe a girl he met during a summer vacation or a girl from another town that he had a fling with and then lost contact with until she shows up with the baby.
Well, maybe the story could start with Stiles finding out about the baby unexpectedly. For example, an old acquaintance shows up with the baby and reveals that it's his. Then he has to deal with the shock and start learning how to be a father while still keeping it a secret from his friends and family.
One great 'Stiles has an accent' fanfiction could be 'The Accented Stiles' on FanFiction.net. It really delves into how his accent affects his interactions with other characters in an interesting way.
One possible plot could be that Stiles discovers he has a baby unexpectedly. Maybe an old fling left a baby on his doorstep. He then has to learn how to be a father while still dealing with his normal life, like school and his friends. He might struggle at first with things like changing diapers and getting up in the middle of the night, but with the support of his friends, he slowly gets the hang of it.
In Stiles werewolf fanfiction, Stiles is often depicted as intelligent. He uses his smarts to navigate the complex world of werewolves. For example, he might figure out a way to break a werewolf curse using his knowledge.
The tail could be a symbol of his uniqueness. Maybe it sets him apart from other characters in the fanfiction world. It might also have some magical properties, like being able to sense danger or hidden magic.
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.