[narkotic]

I was hoping someone would finally mention that ^_^

There are different things attatched to the ends of names in japanese that denote something about the name in relation to you.

For example, Nayoko-chan would mean that she's a child or one of my close friends.

Nayoko-kun would mean she's a fellow student... or a guy. That doesn't fit well, heh.

Nayko-sama means that I a hold her in great respect.

Then there is Nayoko-san, which is attatched to the names of adults or people you don't know or aren't very close to.

Then there is tachi, which is put at the ends of a name to denote more than just that person, like Nayoko-tachi, or Nayoko and the people with her.