Blurr

blurr:

A blurr is a headmate that always or almost always fronts with others and appears to be a blur of the headmates they are fronting with. When they are fronting with one headmate, they will take on the attributes of that one headmate. When they are not fronting with anyone, they appear to have a neutral or numb personality. Not fronting with others may cause them to become a personality shifter.

Related Terms
This is different than blend or blending because the headmates are not actually blended, it's just that the headmate with this role appears blended with the others.

This headmate also may take on the appearance of a ghoster.

This may be similar to shell/prism.