Does Nezuko attack Hashirama in the manga?

Yes, she does. But it happens under specific circumstances and for particular reasons related to the plot.

No, Nezuko doesn't die in the manga. She plays a significant role throughout the story.

Yes, Nezuko does talk in the manga on some occasions.

No, Nezuko doesn't die in the manga. She survives through various challenges and plays an important role till the end.

No, Nezuko doesn't marry Zenitsu in the manga.

Yes, she does. Nezuko eventually regains her humanity in the manga.

Nezuko remains alive in the Demon Slayer manga. The author chose to keep her alive as she is an important character with a vital part to play in the overall narrative.

No, Nezuko didn't die in the manga. She played a crucial role throughout the story.

Nezuko is around 12 years old when the story begins in the manga.

Nezuko's age in the manga varies depending on the story's timeline. But typically, she is depicted as a young teenager.