However they retain their minds and personalities as individuals. Making them susceptible to the reiatsu crush.
And really, Alucard would not be able to absorb Kenpachi. Let's face it, Kenpachi is leagues what Alucard can understand.
I meant Reiatsu Crush them when Alucard let them out as his army.
The giant Hollows that're made up of Thousands of other Hollows, who were originally human souls?