So it took place in chapter 7, and the roaring is happening, Kris is alone, with the feather mode on, running from wherever chapter 6 took place to home, and the world is a terraria type world with, but there's this one friend-like darkner with no name, all I remember of if is that it attacks by biting the soul, and it's a obstacle/bullet pattern, not an actual fight
The image shown is a recreation of Blue Friend