I'm not entirely sure specifically what 'koneko neko neko visual novel' is about as it could be quite a niche or not widely known one. It might be a visual novel centered around cat - like characters (since 'neko' means cat in Japanese). Maybe it has a story about the adventures of these cat - themed characters in a fictional world.
I'm not sure where you can specifically find 'koneko neko neko visual novel'. It might be available on some specialized visual novel platforms. You could try searching for it on platforms like Steam if it's a commercial and approved title there.
First, give your Neko OC a distinct personality. For example, she could be really shy but have a hidden feisty side that only comes out when she's protecting her friends. Second, give her unique physical features. Maybe she has heterochromatic eyes, one blue and one green, which is rare among Nekos. Also, a special ability like super speed or the power to heal others quickly can make her stand out. And don't forget to give her a backstory that ties into the Highschool DxD universe, like she was an experiment by a rogue devil scientist.
I don't have information on who the author of this fanfiction is. There are so many fanfiction writers out there, and without more context, it's hard to determine the author.
I'm not sure specifically as there could be many different interpretations. It might be a fanfiction where the character Harry has an interest in nekos, which are often depicted as cat - like humanoids in some fictional universes.
A neko visual novel is often about stories that involve cat - like characters, usually in a fictional and often Japanese - inspired setting. It might include elements like friendship, adventure, or romance among these neko characters.
The maneki neko originated in Japan. It's believed to bring good luck and prosperity. Different legends explain its origin, but one common story is that it was a beckoning cat that brought good fortune to a shop or home.
There could be her friends. For example, a more health - conscious friend who tries to encourage her to change her slobbish ways. Or a friend who is also a bit of a foodie and sometimes enables her bad eating habits.
Here are some recommended Doujinshi novels with Atobe Keigo's sister as the female protagonist: "The Three Thousand Youth of the Net King","The Floating Light and Shadow of the Net King"(Atobe-sister: Atobe Kirikage)"," The Net King: My Ninth Princess (Atobe-sister: Atobe Kageyo)"," The Net King: When Cherry Blossoms Fly (Atobe-sister: Atobe Kageyo)"," The Net King: Towards the Ultimate of Gorgeousness (Atobe-sister: Atobe Risa)"," The Net King's Angel Flying Without Wings (Atobe-sister: Atobe Kageyo)"," The Net King's Search for..." "The Daily Life of Atobe's Younger Sister,""A Guide to the Nekomata Male God,""Nekomata: Edogawa Sakuraichi,""Nekomata: Summer Romance,""Nekomata: Early Summer,""Nekomata: Green Plum,""Nekomata: Moon Dance," and "Nekomata Doujinshi: Atobe's Younger Sisters." The female protagonists in these novels were all Keigo Atobe's younger sisters, and each novel had a different plot and story development.
I'm not entirely sure specifically what 'neko nin visual novel' is about as there could be many different stories within it. It might involve ninja cats in some sort of fictional adventure or story, perhaps with elements of Japanese culture since 'neko' means cat in Japanese and 'nin' is related to ninja.