I especially like that Llanos didn't just focus on only the most polished of costumes. Sure, a lot of people spend a lot of money to look exactly like a 3D rendering of their favorite game hero, but the rougher cuts bring a ton of personality to the scene, too. One of my favorite portraits took a little creative liberty with her character, arriving as a humanized GLaDOS from Portal. The game's infamous villain isn't human-shaped at all--she's more of a feminine HAL than anything--but no one could mistake this particular cosplayer for anything else.
Llanos made sure to photograph all sorts of characters, too, from obscure game protagonists to Boba Fett to Captain America. He pulled them away from the buzz of the convention to isolate their image against a dark background. Most convention shots are pretty hectic so it's nice to see these cosplayers in quieter portraits. Be sure to check out the whole set over at Llanos's blog.