>>61358987holo-n is a mini-label created between UMJ and Cover, where cover basically "lends" holos to perform in UMJ funded/produced songs and events, but none of them are signed to UMJ directly so they cannot personally make any use of said resources
Mori is signed directly to an UMJ subsidiary, meaning she has her own personal contract with them (rather than being kinda "used" by Cover), which comes with additional restrictions that affect even her ability to release songs with other Holo talents, but in turn she gets to use the UMJ resources and network for herself
in some ways, current Mori is more of an UMJ/EMI Record's talent than Cover's, though Cover still owns the "character"
