[It can, my lord, but the Sirens are creating unique {Kismet} that will add to the {Call My Name} for their personal squads. I suggest you do the same and share it with your {vassal} and those in your army].
Aside from the Sirens, only the original members of the 2nd Amendment have a connection to me as part of my army. I knew the girls would be my {Kindred}, so I didn't use my squad slots on them.
A Death Seeker could create an 8-man squad as his personal army. Although it was called an army, we weren't actually allowed to add any more squads beyond the first one until we became a Specter. From then on, there would be no limit.
The main advantage of being part of my army was that they could use my {Fates} for half the cost and draw souls from me to use. While this sounded good, it meant that they did not receive any benefits that would help them in battle.