My guess is, that she's made a div-layer with a background image (:
EDIT: I was right, I found her code in her stylesheet. She's called the box blackquote, and if you look through her scripts you can easily find out how she did it. I suggest you don't use her code, but make your own. There's nothing wrong with you making a qoute box yourself - it's actually even pretty common.
I did this for you:
blockquote {
text-align: justify;
background: #000000 url('http://www.saruna.net/wp-content/themes/Emo/images/dino.gif') top right no-repeat;
margin: 0;
font-size:11px;
line-height: 18px;
padding: 5px;
border-bottom: 5px solid #000000;
border-top: 5px solid #000000;
border-right: 5px solid #000000;
border-left: 5px solid #000000;
color:#ffffff;
width: 390px;
align:center;
}
To use it on the actual sites you do like this: <blockquote>YOUR TEXT HERE.</blockquote>