One common theme is family loyalty. Given the strong bond within the Kamado family in the original story, this is often explored further in fanfiction. Another theme could be redemption, especially when it comes to Nezuko's situation as a demon. Writers might also focus on the theme of survival, as the family has to deal with the constant threat of demons.
Demon Kamado family fanfiction can be really exciting. It could focus on the untold stories of the Kamado family. Maybe there are stories about their ancestors and how certain family traits were passed down. Some fanfictions might also create alternate universes where the family has different powers or face different types of demons. It gives fans a chance to expand on the original story and get creative with the characters and their relationships.
Tanjiro might use his sense of smell to detect hidden threats. Since his sense of smell is super - enhanced, he could sniff out any demons or traps in the way of saving Rengoku. For example, if there are demons disguised as allies, Tanjiro would be able to tell by their scent.
The father of Tanjiro in 'Blade of Ghost Annihilation' was a member of the Ghost Hunters called Daisuke. He had outstanding combat ability and keen insight. At the same time, he also had a unique thinking and judgment ability, which was called the "transparent realm".
Daisuke had reached this level because he was constantly growing in battle, accepting all kinds of challenges and training, and constantly learning all kinds of knowledge and skills. His combat skills and thinking ability had been greatly improved, allowing him to better deal with various situations and make the right decisions.
In addition, Daisuke also experienced many events and tests, such as a life-and-death struggle with ghosts, parting with relatives and friends, and a life-and-death struggle with enemies. These experiences not only made him stronger and braver, but also made him more mature and wise. That was why he was able to remain calm, decisive, and intelligent in the face of all kinds of difficulties and challenges. He became a solid backing and an important mentor for Tanjiro.
Yes, in some fanfictions, Tanjiro is depicted as the reincarnation of Yoriichi. This concept adds an interesting layer to the story as Yoriichi was an extremely powerful and legendary figure in the original lore. The idea allows for new storylines where Tanjiro might inherit some of Yoriichi's skills or have a deeper connection to the past events related to Yoriichi.
Tanjiro's fate in the manga is that he ultimately passed away. This event was a significant part of the story's development and had a profound impact on the other characters and the overall plot.