Well, it's hard to say. The story is full of surprises and twists, so it's difficult to predict Maki's fate exactly. You might want to keep up with the latest chapters to get the definite answer.
There was a maki that was said to be a ghost. It haunted a particular forest. Hunters would often report seeing a white, maki - like figure darting between the trees. Some thought it was the spirit of a maki that had died in that forest long ago. One hunter even claimed that the maki ghost led him out of the forest when he was lost, as if it had a kind heart despite being a ghost.
Since I don't have much information on this particular 'maki chan to nau visual novel', it might be a story that focuses on the characters of Maki Chan and Nau. Maybe it's a love story, or it could be about them facing challenges together. It could also be set in a unique fictional setting that the developers have created specifically for this visual novel.
One common theme is friendship turning into something more. Since they are friends in the original series, fanfiction often explores the idea of their relationship evolving romantically.
One common theme could be friendship evolving into something more. Maybe they start as friends and gradually develop romantic feelings. Another theme might be adventure. They could go on an adventure together and their relationship deepens during that journey.
Some of the best nozomi x maki fanfiction can be found on Archive of Our Own (AO3) as well. It has a large collection of fan - created works. You might want to look for stories with high ratings and a lot of kudos, which usually indicate good quality.