In the manga, Tanjiro and Kanao don't end up getting married. The story focuses more on their battles and character development rather than romantic pairings.
One common theme is the growth of their relationship. It often starts from a simple acquaintance and develops into a deep emotional bond. For example, they might start as comrades in the fight against demons and gradually fall in love.
One common theme is the exploration of their different personalities coming together. Tanjiro is very kind - hearted and Shinobu has a more complex, somewhat mysterious nature. Fanfics often show how they bridge that gap.
A frequent theme is secrecy. Shinobu's yandere feelings are often something she tries to hide from others, especially from Tanjiro at first. Also, the theme of protection can be seen. Shinobu may see her yandere actions as a way to protect Tanjiro from other threats, real or imagined. This can lead to some interesting plot twists as Tanjiro may not always understand her motives.
One great tanjiro and kanao fanfiction could be where they go on a journey together to find a rare herb for an ailing comrade. In this story, their relationship deepens as they face various obstacles in the forest.
One great 'yandere Shinobu x Tanjiro fanfiction' is 'Shinobu's Obsession'. It really delves into Shinobu's yandere tendencies towards Tanjiro. The story shows how Shinobu's feelings start to cross the line from normal admiration to an all - consuming obsession. It's a really interesting read if you like this kind of pairing.
One popular tanjiro x shinobu fanfic is 'A Bond Beyond Demons'. It focuses on their relationship as they face various challenges together in the demon - slaying world. The story beautifully weaves their individual personalities and how they complement each other.
Another great one is 'Tanjiro and Shinobu's Journey'. In this, they go on a journey together that tests their relationship. It shows how they support each other through tough times, and it's full of action and emotional moments that make it an engaging read.
Another theme is mentorship. Shinobu, being more experienced, often acts as a mentor to Tanjiro. She imparts her knowledge about demons and fighting techniques. This is seen in quite a few fanfictions where Tanjiro looks up to Shinobu for guidance.