User blog comment:Zathronas/Analysis by an author: Volume 2 episode 4 Painting the town.../@comment-78.42.186.25-20140815142643/@comment-24218038-20140815143746

It's based on the white exo-skeleton of a grimm.

As for the bouncer, it's possible but remember Monty and the gang had a lot more time on vol 2 than vol 1. They may put more details in places.