Was it considered copyright violation when the original characters appeared in the novel?

The appearance of the original character when writing a derivative novel may be an copyright violation if it is published without the authorization of the original character. When creating derivative novels, one should ensure that the existence and image of the original characters were not violated. If the image, name, plot, and other elements of the original character were used in the creation of a derivative novel, it would constitute an act of copyright violation against the original character. If the derivative novel is related to the original novel, such as in terms of storyline, character setting, or relationship between characters, there may also be an act of copyright violation. In this case, the author needed to ensure that there was a certain connection and similarity between his creation and the original novel to avoid being regarded as copyright violation. If the author uses the image, name, plot, and other elements of the original character and uses them for his own derivative novel creation without obtaining the authorization of the original character, it may constitute an copyright violation. In order to avoid the problem of copyright violation, the author should carefully use the image and elements of the original characters and try to obtain the authorization of the original characters or seek other legal channels.