The ending of the anime “NANA” is discussed in the provided Reddit thread, focusing on the final episode, Episode 47, titled “Fireworks Display, Hachi and NANA.” The episode begins with a flashforward to 6 years in the future, where Hachi and her daughter Satsuki meet up with Shin, Yasu, and Nobu in apartment 707. The whereabouts of Nana are unknown, and the characters seem to be waiting for her, raising questions about why Nana and Hachi are so distant.

The episode raises questions about the relationships between the characters, particularly Hachi’s relationship with Nobu and Takumi. Hachi is still wearing her engagement ring, suggesting she is still engaged to Takumi, and Satsuki is hinted to be Takumi’s daughter. However, there are still unresolved emotions between Hachi and Nobu.

The episode also depicts Hachi struggling with her feelings for Nobu in the “current” time, and Nana convincing Hachi to come, leaving Nobu feeling crushed. Nobu decides to end that chapter in his life, and the characters grow distant due to the decisions they made in pursuit of their own happiness.

The finale leaves many questions unanswered, such as the fate of Blast and Trapnest, and the whereabouts of Ren and Takumi. However, it provides a sense of closure as the characters have found a degree of stability and normalcy in their lives, even though Nana appears to be missing.

The anime concludes on manga chapter 42, and the manga can be picked up from chapter 43 for those who wish to continue the story. However, it is noted that the manga is on indefinite hiatus and does not have a definitive ending.

For more detailed discussions and insights, you can refer to the Reddit discussion thread.