Stupid: doesn't know what bust is. Incompetent: can't fucking open a dictionary.
In the arcade version, when you select a character, it gives you a brief HERE'S YOUR DUDE HERE'S HIS STATS HERE'S YOUR MISSION thing because it's an arcade game and they always do that. There are pictures involved in this process, and that's what the pack contains.
Y'know what? Save yourself some trouble and wait until I upload all the new shit from the console, since it'll be packed more neatly anyway and even you should have no trouble distinguishing a picture of someone's face from a picture of their entire body.