At its base, lock-merge is a means for headmates to co-experience life as another headmate called the hub. As opposed to a normal merge, the hub is both arbitrary and doesn't require any specific instances. Also the hub, being arbitrary, can literally be anyone.
The experience as a constituent of the lock-merge is as if you are playing the part of the hub and its actually you. The hub experiences normally without input or consequences of hosting constituents.
Unlike a subsystem, a lock-merge does not speak between the hub or any constituents everyone acts as one person. The memory generated is normal like an actor who played a part of a well known character, but that character was in reality your headmate that was expressed.
Everyone in the lock-merge feels forced and active simultaneously.
