User blog comment:OnGoji/Ultraman Manga Chapter 20 Released/@comment-17070698-20140217193453

Also, here's the Alien from before in chapter 18.

This one is named Alien Kadder, not sure if he's from any known Ultraman alien or monster though. Beyond that, I had found these from ULTRAMAN Volume 3, someone finally uploaded it online. Volume 4 is released, so I wonder when that will show up.