The main differences in the 'oni chichi manga' and its adaptations lie in the visual presentation and sometimes the pacing. The art style might vary a bit, and certain scenes could be shortened or expanded for better flow in the adaptation. But the core story and characters remain largely the same.
Well, it's possible that the 'oni ga deru' raw manga and its adaptations vary in how they present the story. Maybe there are changes in the order of events or emphasis on certain aspects. However, more research is needed to determine the exact dissimilarities.
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.