An AU fanfic is a type of fan fiction where the story takes place in an alternate universe with different settings or circumstances than the original work.
An au fanfic is a type of fan-written story that takes the characters or setting of an existing work and places them in an alternate universe or situation that differs from the original.
In this AU fanfiction, Tsuna's fear of girls could stem from various reasons. Maybe he had a bad experience in his childhood related to a girl. It could also be that he's just very shy and doesn't know how to interact with the opposite sex. This fear can add an interesting dynamic to the story as it can create comical situations when he's forced to interact with girls.
Toga could be an ally. Since she has her own complex relationship with the idea of heroes and villains, she might find Deku's transformation interesting. She could provide some of her unique skills, like shape - shifting, to help Deku in his villainous plans. Additionally, Twice might also join them because of his loyalty to Toga and his own sense of being an outcast in the hero world.
In this fanfiction, Deku's character development could be quite complex. Going back in time, he may initially be overconfident because he thinks he knows what's going to happen. But as he realizes that changing the past has unforeseen consequences, he becomes more cautious. He also might develop a deeper understanding of his friends and their potential, as he gets to see them at an earlier stage. He could start mentoring some of them, which would in turn make him more responsible and mature as a character.
Naruto's outgoing and boisterous personality would make Deku more confident. He would probably be more upfront and less shy. Naruto's strong sense of justice would also intensify Deku's already existing desire to help others.
In fanfiction, 'au' is short for 'alternate universe'. It allows fans to explore different 'what - if' scenarios. For instance, in a Supernatural AU, the characters could be normal humans instead of hunters. Writers can change character relationships, like Sam and Dean being estranged instead of the close brothers they are in the original show. It gives a lot of creative freedom to play around with the source material in new and exciting ways.
For Belle, as a barmaid, she could be developed as having a more street - smart side. She has to deal with all kinds of customers, so she becomes tougher and more resourceful. The Beast, in this AU, could start off as more withdrawn and bitter. His encounters with Belle at the tavern gradually soften him. He could learn about human kindness and humor from observing the interactions in the tavern.
One way is to have an open and honest conversation with the host family during the interview process. Au pairs can ask about the family's expectations and also share their own. And during the stay, if something is wrong, don't be afraid to speak up or seek help from the au pair agency. Au pairs should also trust their instincts. If something seems off during the initial contact with the family, it might be a sign to look for another opportunity.