Nico chan (serious face) is a vector of m author. This vector includes Smiley Face, Nico Chan Mark, Nico Nico Mark, Smiley Mark, Nico-chan tags. To download vector (JPG, SVG, PNG, AI/EPS types) you need to register the account and log in.
As the free account, you can download for free with some limits.
As the premium account, you can download unlimited, no waiting time, etc. Enjoin premium membership at here