The individuals created by cloning technology can never be 100% identical.
Therefore, generally speaking, advanced cloning technology will incorporate two additional technologies: memory real-time conversion and personality calibration.
Memory real-time conversion allows the clone to seamlessly possess the memories of the original.
As for personality calibration, it's simpler: a saying goes that by the age of three, a person's nature will show. To drastically change one's personality without significant upheavals is impossible.
With cloning, combined with these two technologies, the probability of the clone rebelling is reduced by 90%.
However, exceptions exist.
For instance, if the person is innately rebellious.
Quite coincidentally, Cain Vinos is such a person; he is an extreme egoist and hides it very well.
So well that no one doubts his loyalty, and after enduring numerous trials, he successfully rose to become the 'Young Master'.
