Nezuko is initially 12 years old in the manga. As the story unfolds, her age doesn't change significantly in a traditional sense, but her character development is quite remarkable.
In the Name of Family received a positive response in Korea. The drama was very popular in Korea and won the 2021 Seoul TV Series Award for Excellence in the Long-Form TV Series Department. South Korea also decided to remake the show and renamed it Assembled Family. Huang Yinye, Bae Xiansheng, and Zheng Caiyan were the main cast. This news caused a heated discussion among the netizens. Although some netizens had different opinions on the casting, there were also people who were looking forward to the performance of the Korean version. However, the search results did not provide any information about the specific reaction of the show in Korea or the audience's comments.
A simple Nezuko and Zenitsu fanfiction could be that they go on a journey together. Along the way, they encounter other demon slayers who are initially skeptical of Nezuko. But Zenitsu stands up for her, explaining that she's different. This shows the depth of their friendship and how Zenitsu has come to trust Nezuko completely.