Well, 'Hail Mary Science Fiction' might refer to science fiction works that have a very high - stakes, last - ditch - effort kind of plot. For example, in a story, the Earth is about to be destroyed and the characters have to come up with a wild, untested scientific solution, much like a 'hail mary' play in sports. It often involves taking huge risks with technology or alien encounters to save the day.
The creativity in 'All Hail Lelouch' fanfic is really appealing. Writers can introduce new characters that fit seamlessly into the existing world. These new characters can bring fresh perspectives and storylines. Moreover, the fanfic can focus on the psychological aspects of Lelouch. Since he is such a complex character, fanfic can explore his inner thoughts and feelings more in - depth. It gives readers a chance to see different sides of him that might not have been fully explored in the original series. Additionally, the fanfic might explore how the events of the series impact the world on a larger scale, such as the political and social changes.
I'm sorry, I haven't read 'All Hail Lady Blanche Novel' specifically. It could be a story centered around a character named Lady Blanche, perhaps detailing her adventures, her social status, or her relationships within the fictional world of the novel.