I'm sorry, but I don't know who the author of 'ao oni novel' is. There may not be a lot of publicly available information about it, or it could be a relatively unknown work.
Well, 'ao oni' could potentially be a character or a concept within the novel. Maybe it tells a story of this ao oni's adventures, its relationships with other characters in the fictional world. It could also explore themes related to good and evil if the oni represents the 'evil' side, or it might be a more complex story where the ao oni has a different nature than what is traditionally expected of an oni.
One common theme could be identity. Naruto having to come to terms with being an oni while still being a ninja. Another might be power struggles, as his oni powers could be either a great asset or a dangerous liability.
Since I don't have detailed information about 'oni chichi light novel', it might be a story that combines elements of Japanese supernatural beings (the oni) and a character named Chichi. It could be an adventure where Chichi has to deal with oni - related problems, or it could be a more character - driven story exploring the nature of oni and how Chichi interacts with them. Maybe it also delves into the cultural aspects of oni in Japanese culture.
I'm not entirely sure specifically as there could be different stories within 'ao oni light novel'. Generally, it might involve some unique characters, a fictional world, and a plot full of mystery or adventure.
A 'oni musume visual novel' is likely to be a visual novel centered around oni girls. Visual novels are known for their narrative - it could be a story of the oni musume's struggle between their oni nature and the human world they might be involved with. It may also contain elements like romance, mystery, or battles depending on the plot and the developer's vision.
I'm not entirely sure specifically what 'ao oni visual novel' is about as there could be many interpretations. But generally, a visual novel often involves a story with characters, dialogue, and choices. It might be centered around the 'ao oni' which could potentially be a character, a concept, or something related to a particular setting.
I'm not entirely sure specifically what 'oni uta visual novel' is about without more context. It could potentially be a visual novel related to oni (which often refers to demons or ogres in Japanese culture) and perhaps involve a story, characters, and interactions within that theme.
The exact origin of when oni first appeared in stories is hard to pinpoint precisely. But they have been a part of folklore and myths for centuries in various cultures.