Final answer:
Miles and Ganke's Halloween costumes were crafted to conceal their identities and were themed around black-and-white crosswalk patterns, adding a clever urban twist to their ensembles.
Step-by-step explanation:
The costumes that Miles and Ganke chose for the Halloween party were designed to keep their identities a secret while also making a visual connection to black-and-white crosswalk patterns. These costumes allowed them to blend into the festive atmosphere without revealing who they were, providing them with the opportunity to enjoy the celebrations while maintaining their privacy.
The choice of costumes that reference crosswalks can also be seen as a clever nod to urban life and potentially even to characters' navigation through complex social environments, much like pedestrians crossing a busy street.