who does tanjiro fall in love with

Tanjiro doesn't marry anyone in the manga.

Tanjiro doesn't end up with anyone romantically in the manga. The focus is mainly on his quest to defeat demons and save his sister.

It develops gradually. At first, they are just fellow Demon Slayers. But as they spend more time together, they start to understand each other better. Tanjiro's unwavering determination and his ability to see the good in everyone, including Kanao, make her fall for him. Kanao also shows her loyalty and care towards Tanjiro, which deepens their connection.

Yes, Tanjiro does die in the manga. It's a sad but significant part of the story.

Yes, Tanjiro does die in the manga.

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.

Yes, Tanjiro eventually becomes a Hashira in the manga after going through many challenging battles and growth.

Well, Tanjiro's fate in the manga is tied to his determination to save others and the ultimate confrontation with powerful foes. His death comes as a poignant end to his heroic journey.

Yes, Tanjiro does turn into a demon in the manga.

Yes, Tanjiro does manage to kill Muzan in the manga.