Since I answered questions about my other Fanfic, "Little Lucy" , I figured that there are still some questions that ain't clear.
SO, Q & A Time!

1. Where does Nashi stay?
-She lives with her mother, Lucy in her apartment. Though Mira suggested Fairy Hills to her, she declined.

2. Is Natsu even aware of his position in the eyes of Nashi?
-Yes, Natsu is aware that he's Nashi's father, even if he doesn't show it.

3. Who is more comfortable with calling Nashi "daughter" ?
-Lucy, given the fact that they live together.

4. Just how long has it been since Nashi appeared out of nowhere?
-A month has successfully passed since her arrival, and has been made a part of Team Natsu.

5. Did the whole guild just accept her story?
-Yes, given the guilds happy-go-lucky attitude, she got accepted pretty quickly.