A new character poster of Kick-Ass has been unveiled, it features Christopher Mintz-Plasse as the Red Mist:

Kick-Ass Trailer

(Click on the poster to enlarge it.)

Here’s a picture of the Red Mist:

(Click on the picture to enlarge it.)

The Red Mist was inspired by Kick-Ass to become a vigilante. He later on teams up with Kick-Ass on street patrol.
:)