There was no clear answer as to whether Darker was dead or alive. Different novel settings and plots might have different answers. In some novels, Darker might be dead, but in others, Darker might still be alive. The Dark One is a very popular novel series with a large number of readers and supporters, so readers who have different opinions on Darker's life and death may have different opinions.
It varies from one fanfiction to another. Some fanfictions might depict Naruto as dead to introduce a new set of challenges for the remaining characters. For example, if Naruto dies, Konoha might be left vulnerable, and characters like Sasuke or Sakura would have to step up in different ways. But there are also plenty of fanfictions where Naruto remains alive and continues his journey, perhaps facing new and even more dangerous threats than in the original series.
Slash! In the ending of the Red Pupils manga, the male protagonist (Night Fog Man) did not die but was transformed into a machine. In the final chapter of the manga, the protagonist and other characters worked together to defeat the villain with strange abilities, and the Night Fog Man was transformed into a powerful machine.
In addition to the Misty Night Man, there were other characters in the manga that survived, including:
1. Misty Night Walker's classmate, Swordswoman Hanamura Yukino. She survived the battle and became a good friend and ally of Misty Night Walker.
2. The villain, Ichigo Amagasaki, was defeated in the final words but did not die. Instead, he was transformed into another machine.
3 Other characters such as the female ninja Mizishima Tsuko who had the ability to fly, the male ninja Tsutomi Arimon who was good at using weapons, and the villain Amagasaki Shiori also survived the final episode.
As of now, Uta is indeed alive. The story hasn't depicted anything otherwise. Maybe there'll be changes in the future, but for now, Uta's part in the manga continues with them being alive.