The anime not covering the manga fully can be attributed to a few factors. Maybe the manga's storyline is too complex to be covered exactly, or the anime producers have a different vision for the story's presentation. Sometimes, it's also about appealing to a wider audience and making necessary edits.
The Claymore anime doesn't cover the manga fully. There are significant differences and omissions. However, both the anime and manga have their own merits and appeal to different audiences.
Battle Through the Heavens was a fantasy novel written by Tian Can Tu Dou. It described the story of the protagonist Xiao Yan rising up during his training. Although the novel Battle Through the Heavens had many readers around the world, it had not been adapted into a manga. This was because the plot in the novel Battle Through the Heavens was more complicated and required a lot of painting and description to show. In contrast, comics could express the story better through simple lines and fast style, which was more suitable for animation production. The theme and plot of Battle Through the Heavens were not suitable to be adapted into an anime. There were many political, social, and ethical issues in the novel, which might be difficult to express in the manga. All in all, Battle Through the Heavens was not adapted into a manga.
There are a few anime like 'Kiznaiver' that don't have a manga. It might be because the story was conceived directly for the anime format to offer a unique viewing experience.
The adaptation not fitting the comic can happen because of changes in the market or audience preferences. Sometimes, legal or rights issues can also cause differences. Additionally, the limitations of the new medium might prevent a one-to-one match.
Could be that the characters aren't relatable or the themes don't appeal to your interests. Sometimes it's just a matter of personal preference and not a reflection on the quality of the manga itself.
" Lord of the Mysteries " was a popular fantasy novel. The author was Squid, who loved to dive. It was published on Qidian Chinese website and was loved by readers. This novel told a legend about The Fool. On the Qidian Reading App, readers could read authentic books and listen to authentic audio. The male lead was called Klein Moretti. He was gentle, kind, cautious, and meticulous. He was known as The Fool. The female lead was called Audrey Hall. She was strong, brave, kind, and upright. She was called Justice.
Celestial Bane was a popular xianxia novel by Xiao Ding. It was published on Qidian Chinese website and was very popular among readers. The story described the extraordinary life of an ordinary youth under the circumstances where the world was cold and heartless and treated everything as grass. On the Qidian Reading App, readers could read authentic books and listen to authentic audio. The male lead was called Zhang Xiaofan. He was an ordinary young man who valued relationships and loyalty. Although he was not talented, he had a strong will. The female lead was called Lu Xueqi. She was a cold fairy with extremely high talent. Her loyalty to the sect exceeded her pursuit of love.
The reason why the Lord of the Mysteries did not release an anime was because the manga project had failed. It could not meet the expectations of most fans, and it was difficult to attract new audiences. In addition, there were also people who believed that the atmosphere, battle, and life of the Lord of the Mysteries needed to be portrayed in detail, and this required a lot of funding. In addition, there were also people who believed that anime adapted from online novels were often modified by Doujinshi and could not be restored to the original. In addition, some people felt that the Lord of the Mysteries was not suitable for adaptation into a game because the combat system and skill settings would destroy the balance. To sum up, the Lord of the Mysteries did not release an anime because of various reasons.
There was no clear answer as to why Celestial Bane had not been made into an anime yet. Some of the answers mentioned that it might be because no one was willing to make anime, or because making anime required technology and cost, and it might not be widely recognized by domestic and foreign audiences. In addition, some of the replies mentioned that Celestial Bane's animation adaptation needed to respect the original work and was not just a simple emotional make-up. All in all, there was no definite explanation as to why Celestial Bane had not been made into an anime yet.
One reason could be that the anime production might have faced issues like budget constraints or time limits. They may not have been able to continue adapting the entire manga storyline.