Although the intelligence Rias provided made that man named Ramsus seem the most likely mastermind, Duanmu Huai had been betrayed by missions too many times to lack experience. He had long known that someone who appeared to be the mastermind on the surface was not necessarily the true mastermind.
Of course, one could say that Ramsus had deliberately reduced the guards around Naruse Mio, causing her to be hunted repeatedly so he could borrow someone else's hand to kill her. But it was also possible that Ramsus had used this method to restrain the others. After all, the more guards there were, the more complicated things became. By then, one's allies might even prove more dangerous than one's enemies.
Duanmu Huai had experienced similar things before. After killing the BOSS, an npc on his side had suddenly jumped out and declared that they were the true mastermind behind everything, while the BOSS had merely taken the blame innocently... Naturally, the player had killed them right afterward.
Besides, Rias was a member of the Gremory Family after all. It was obviously impossible for her to investigate the internal intelligence of another family in too much detail.
Thus, Duanmu Huai temporarily put the matter out of his mind and turned to Naruse Mio's special training.
Now that Naruse Mio's power had awakened, deciding on the next step was easy. Duanmu Huai knew nothing about space, but he did have some experience with gravity.
The first thing he naturally had to teach her was how to fly.
Generally speaking, flight was instinctive for demons. Naruse Mio's situation, however, was that although her power had awakened, she had not yet transformed into a demonic form with wings and a tail like Rias or Maria. Duanmu Huai considered this perfectly normal. Wasn't that how protagonists