After a Haibane has received a name, they are given a halo which floats over their head, "to be a guide for the future." The connection may be tenuous at first, but once the halo "sticks," it is almost like a part of the Haibane's body and can be used to drag them about or to support the weight of other objects. These halos glow brightly, and in the "dōjinshi" they spin rapidly as well. It is later revealed that they are forged from metallic flakes, called , which can be found in tunnels in the wall that surrounds the city.