1-The fourth quest in the base game (The quest with the princess). The start area is made of 4 little room or it's a big room?

2-Is a figure with fly ability is immune to grip?

Thanks

1. You will need to assemble four room tiles to create that starting area (there is no tile included in the game that is that size).

2. There is nothing in the game called "grip." If you mean the Grapple ability, then no, figures with Fly are not immune.

1- I know but... do we consider the four pieces as a big room (We ignore de walls) or it's really 4 room that form the start area?

2- I don't have the game in english Thanks for the answer!

Bashwilly said:

You still use the walls. At least, there's no indication that you should do otherwise.

Of course, the walls in the middle of the room are surrounded by rubble, and thus don't usually matter. You could maybe argue that you're supposed to pretend they don't exist on the basis that they aren't drawn on the quest map, but that would just be conjecture...and, as I said, it won't usually matter.

But the bane spiders are definitely placed such that you can't get from one corner of the room to another without killing or moving them first.

As a general rule, the walls on the map pieces are always present, no matter how the pieces are arranged.