Pictures

If you're talking about how they might have a picture for each character in their posts, you can use something called templates. Go up to the top, click Profile, click Edit Profile, and you will see a little box called Templates. Click New, name it, type in the coding into the box below, and then scroll down and click Modify Profile. Now when you post, you'll see a drop down box with '--------' in it. Click down onto your dropdown box, choose your template, and it will appear. Just try it out, it's easier to get when you do it yourself.

Hope this helped ^^