Thank you!
Yes, the fluffy thing is Pugzlie.
Um. Yes, there is a story... Pugzlie was created when I was trying to draw a mouse on my brother's birthday card and failed terribly. After that I started drawing him with different expressions when ever I had art block or was bored because he's easy to draw. And I decided to turn him into my sort of mascot.
Echo just kind of popped into my head like all my other billions of characters. I'm still working on a story for her. She'll probably turn up in one of my other stories with Pugzlie... years from now if I ever get around to posting them.