I believe that each tab is it’s own “method”, not necessarily it’s own
program. The init method is what happens when the npc is first created, and
it only runs once. The other methods get called when you do a certain
thing. Such as dialogue, that happens when you talk to the npc. I’m not
sure if you can, but maybe you can add other methods for different things.

For your variables, you can declare variables in the init method. But they
need to have the “this” identifier. This makes the variable what is called
a “field variable” or “attribute.” An example of declaring a field variable
would be like:

var this._xCoordinate;

this declares a variable called _xCoordinate. And now you can use it
anywhere in any certain npc (if I had to guess). The reason this works is
because I believe each NPC belongs to a class. Declaring a field variable
in a class allows the variable to be used anywhere in the class. This
should allow it to be used in any method in the NPC.

PS. The underscore is not necessary, it is merely a naming convention for
field variables. Also, make sure that all field variables are declared in
the Init method. You don’t want to declare it in any other method. I hope
this helps! Hopefully other people can help contribute to this as well in
case I said something wrong or if I missed anything.

And before the comment section flames me… I know the village isn;t
actually covered in leaves… Kohana village