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.
One implication is that Tanjiro may have access to Yoriichi's combat skills. Yoriichi was a master swordsman, so Tanjiro could potentially inherit his swordsmanship techniques, making him even more formidable in battles against demons.
I'm not sure if it's a common type. It depends on the popularity of the original work that Kaname and Zero are from. If the original has a large fan base and a lot of fans are interested in exploring the darker side of the relationship between these two characters, then there might be a fair amount of such fanfiction. But generally, it might not be as common as more positive or mainstream storylines in fanfiction.
The Final Fantasy Type - Zero Story is a rich and engaging one. It begins with the students of Class Zero in the Akademeia military academy. This academy is in a world where power struggles are rife, especially with the threat of the Militesi Empire. These students are no ordinary ones; they possess special powers. As the story unfolds, they are thrust into the middle of a war. They have to make difficult decisions, not just in combat but also regarding the future of their world. Their relationships with each other also play a crucial role. Some are friends, some rivals, but all must work together to face the common enemy. The story is filled with action - packed battles, emotional moments, and a deep exploration of the world's lore and politics.
In the manga, it's a close call. Yoriichi has exceptional skills and powers, but Muzan has his own tricks up his sleeve. The outcome could be influenced by the circumstances and their strategies during the battle.
The battle of Yoriichi vs Kokushibo can be found in the advanced stages of the Demon Slayer manga. It's an intense and highly anticipated confrontation. The build-up and action are both masterfully depicted.
I don't think it's a straightforward true story. Usually, such shows take liberties and combine various elements to make it more captivating. Maybe there are loose connections to reality, but it's not a pure retelling of actual events.
I'm not entirely sure specifically which 'zero zero zero true story' you're referring to. It could potentially be about a lot of things. It might be a code or a title related to a mystery or real - life event that is not widely known without more context.