I think this has been done before, but I can't find it, so I'll start a new one.
Describe a character in the first person (as tho that character is doing the talking) and then the next person has to guess who that character is. You cannot give physical descriptions such as hair color or eye color (scars and tattoos are allowed), you can't use any lines or references to specific scenes from the show, and obviously you can't use any pictures.
I take care of my little brother.
I am a hunter.
A lot of women find me irresistible.
The answer, of course, is Dean Winchester.
The descriptions can be as long or as short as you want, as long as there is no confusion as to which character you're talking about.