Visera

Visera (別れ空 (ヴァゼラ) Baizera; Spanish for "Visor", Japanese for "Parting Emptiness") is a technique utilized by who possess  powers. It is commonly used in the fighting style of the,.

Usage
Visera is a simple method of utilizing the Hollow mask. Once generated, the power of the mask doesn't activate until it is worn properly over the face — best seen with Hiyori herself, who can generate her mask with no physical movement, but she doesn't gain the noticeable traits that come with Hollowfication until the mask is pulled on and her face is hidden. With Shinigami-Hollow hybrids who have a certain level of skill, the mask can be 'removed', and worn on the side of their head or face, dangling and yet still attached to their skull.

The utilization of this method is referred to as "Visera", and it is a form of power conservation. By removing the mask from their face proper, a Shinigami-Hollow hybrid can extend the time they can remain Hollowfied, however, they will experience a drop in power as a result. The power increase is still present, merely diminished; Hiyori was still more than capable of mahandling a masked — admittedly who had just begun training — while employing Visera. The physical traits still remain; the blackened sclera and altered iris colouration, however, the Shinigami loses access to abilities such as, and, in the case of more advanced powers, , until the mask is donned once more.

Ichigo displays a similar method of fighting while his mask is broken; he retains a significant boost to his powers when even a portion of his mask remains, however, it isn't as substantial as the full mask. Whether this has any relation to training under Hiyori, or simply natural talent, remains unknown.