The Sekirei who had grown close to Naruto would be devastated. They would feel a deep sense of betrayal, especially if they had come to trust and rely on him. They might go through a range of emotions from disbelief to rage. Naruto's enemies in both worlds, on the other hand, would see this as an opportunity. They would try to use the situation to their advantage, perhaps by turning the Sekirei completely against Naruto. Naruto himself would probably be conflicted. He might regret the way things turned out but still feel that his actions were necessary.
Hermione would be very curious. She'd probably try to research everything about the Sekirei, from their origin to their powers. Harry might be a bit more cautious, but also see the potential of having the Sekirei as allies. Ron, on the other hand, would probably be a bit more skeptical at first, thinking they might be some kind of new dark magic.
It might not be extremely popular. While both Naruto and Sekirei have their own large fanbases, combining them in a fanfiction in this way is a rather niche idea. Many fans of each series are more focused on the original storylines, characters, and lore of their respective shows. However, there are always some fans who enjoy exploring crossovers and unique interpretations, so it could have a small following among those who like to think outside the box in fanfiction.
Naruto's chakra could potentially enhance the Sekirei abilities. For instance, if a Sekirei has a power related to speed, Naruto could use his chakra to further boost that speed. His Rasengan could also be modified when combined with a Sekirei's power. Maybe it could take on new forms or have additional effects.
Sekirei Lemon Fanfic is likely a fan - created story related to the Sekirei series that might contain some romantic or citrus - like (lemon often implies a bit of a more romantic or spicy take in fanfic terms) elements. It could focus on the relationships between the Sekirei characters in a more in - depth or alternative way than the original work.
The Sekirei manga has indeed finished. It wrapped up its story, providing closure to the fans. There might have been some mixed feelings among readers about the ending, but it officially concluded.
Well, the 'free sekirei light novel' focuses on a story where there are Sekirei. These Sekirei have to participate in a certain plan. It's a story full of action and some elements of fantasy. The characters in it are interesting, like Minato Sahashi, who gets involved with these Sekirei. There are also various power - ups and revelations as the story unfolds.
I'm not entirely sure specifically as there could be many different 'naruto sekirei sage fanfic' stories. Generally, it might combine elements from Naruto, Sekirei, and perhaps the concept of a sage. It could be about a crossover where characters from Naruto and Sekirei universes interact in a story that also involves sage - like powers or characters.