Tip for random Spirit encounter:
Always pay attention when they greet you back:
How and why?
If their mouth are open means that they like fun people and you can play with them as a bonus, most easiest ones.
If their eyes narrows mean that they are more neutral so answer them more... neutral? I mean not be so funny but not so serious, they will not accept playing with you.
And last if they keep their face normally they are responsable and serious so be the opposite of fun for them, they will tell you that they not into games.
This can help you to get light and items better so dont skip the introduction please.
Good night :D