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.
Fan Xian's performance in " Celebrating Years " had caused some of the audience's dissatisfaction and disgust. Some people thought that he was an extremely selfish, incompetent, but self-important person, and no matter what he did, the author could smoothly explain that he was in control. There were also people who felt disgusted by Fan Xian's flirting with other women and thought his behavior was annoying. In addition, Fan Xian had relationships with many women in the play, which made some of the audience suddenly not want to continue watching. However, there were also people who mentioned some of Fan Xian's positive characteristics in the play, such as his resourcefulness and influence. In short, Fan Xian's performance in " Celebrating Years " had aroused different emotions and evaluations from the audience.
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.
Tanjiro's strength in the manga is significant. He acquires new powers and techniques, and overcomes numerous powerful foes with determination and strategy.