Kurosu

Kurosu is a raven and a campanion of Aragami while he was Ryo and while he was Aragami. Yamiko when in the “ Good “ disguise guides you to Kurosu then you have a vision of Kurosu flying above Ryo before being Aragami.

Practical use:

The skill known as Kurosu allows Aragami to scout out locations and show you your objective