Characters - an introduction

Sometimes I write about my characters so much, and know them so well, that they become real. To me, anyway. Like the three dragons, who I wrote about when I was very little and who decided to stick around, I have a couple other people hanging around in my house. The annoying thing is that no one else sees them, so I am apt to laugh out loud at Caz's sarcastic sense of humour, and then my family stare at me like my hair has turned blue.
Various other characters are at the other extreme, or somewhere in the sliding scale.
Ah well. You'll be hearing from these guys fairly frequently, I suspect, since they are inherently nosey.