To understand Grimm, you need to understand the man who gave birth to her. Calvin Grimm III was a successful architect who was well known in the states by the time he reached his sixties. A plot of land had been established, under a unified vote of New Jersians, to turn the pocked marks of dead space on New Jersey's northern end that was too rugged for farming and too frigid for living on a homestead. When that time came, so did Calvin. He worked and toiled on schematics for four years before even beginning the project. By the time the city was truly underway he was in his early 70's.
It was about then that dementia started to take root.
Grimm started making unexpected changes to the cityscape designs, seemingly pointless revisions that served no purpose. Roads led to dead ends directly within the city center. Alleyways very often lead to dead ends. Some buildings are designed in a spiral formation that resembles spinning water. Nobody would argue with the man though because of his status. So works of madness and genius interweaved into a functional manifestation of one man's insanity. By the time they realized what they had it was too late.