There will definitely be more Naya content, but I’m not sure which update it will be included in yet.
The last thing I get about Naya is about her baker's uniform, but when I try to enter the place they tell me that first I have to visit the bakery with Lina. Will that come in future updates? And another thing, the game tells me that I have to spend time with Marina, but it only lets me do the wine thing and with each of the characters I have done many of their missions and now in all of them I get "you must continue with the main story to follow the story of x character"