Black Blind was still alive in both The Ultimate notebook and The Sea of Sand, but in the finale of The Ultimate notebook, Black Blind's life and death were not clearly explained. Therefore, it was impossible to confirm whether Black Blind had returned alive.
Black Blind's ending in the Grave Robber's Chronicles series was not clearly explained. Some documents mentioned that Black Blind sacrificed himself to protect Wu Xie and Xiao Hua in the plot, but it was not clear whether he survived or not. Other documents mentioned that Black Blind Man survived the plot and appeared in subsequent works. However, due to the inconsistent search results and incomplete information, it was impossible to draw a definite conclusion. Therefore, it was uncertain whether Black Blind was still alive in the end.
The reason the Qing Emperor had allowed Fan Xian to return alive was out of his concern and worry as a father. The Qing Emperor hoped that Fan Xian could return safely and that he could become a capable and responsible person to contribute to the future of the Qing Kingdom. The Qing Emperor had sent Fan Xian to Northern Qi to test his abilities and hoped that he could successfully complete the mission. Although the Qing Emperor did not explain in detail why he had warned Fan Xian in Taiping Courtyard, the audience could see that the Qing Emperor hoped that Fan Xian would return safely. Only Chen Pingping and the Second Prince could truly understand the Qing Emperor's concern and request. The Qing Emperor's concern was not only as an Emperor, but also as a father.
It's possible. Comics have a way of bringing back characters in unexpected ways.
The reason why Black Blind was immortal was because he had entered the bronze door. While Zhang Qi Ling was guarding the bronze door, Black Blind had been looking for the oil bottle. Later, Black Blind entered the bronze door in the Cloud Dingtian Palace. However, he did not mention what happened at the bronze door. After entering the bronze door, Black Blind's eyes were burned by the flames of the bronze door, and he became an expert with eye diseases. At the same time, he also obtained the same longevity physique as the Zhang family. Therefore, Black Blind's blindness and immortality were all due to entering the bronze door.
There was some uncertainty and mystery about Black Blind's background. According to the conclusion of many documents, Black Blind was one of the Eight Banners nobles in the Manchu Qing Dynasty. His Han surname should be Qi, but he was not a descendant of the Nine Gates Qi family. He might be a Manchu Bannermen and was related to Qi Yu or the Qi family. Black Blind's real name was unknown, but according to speculation, his name should have four words. In addition, he was Wu Xie's master and the only immortal who did not have the surname Zhang. He was very skilled in martial arts and was called blind in the south and mute in the north along with Zhang Qiling in Jianghu. However, the details of his background and identity were still mysterious. Therefore, there was no conclusive answer to Black Blind's background.
Sure did. Negan made a comeback in the comic series. His return added some new twists and turns to the story.
Jiu Chen was able to come back because during the three hundred years in the Demon Realm, he had coincidentally activated the special function of the Longevity Knot and walked out of the Demon Realm. Although the details were not mentioned, Jiu Chen finally returned to the human world and reunited with Lingxi and his daughter.
Yes, Vision did come back in some comic storylines.
Yes, she does. Sometimes she makes comebacks in various storylines.
Well, the return date of the Black Clover manga is still unknown. Usually, such information gets revealed by the publisher or the creator through official channels. So, it's best to follow their updates.