Note: This is written from research of MCU, comics, any other version, and a bit of imagination.
The Mind Stone represents and governs the fabric of mind, it grants whoever holds it complete control over the hearts and minds of others beings, from the most weakest being to the most powerful being in creation, placing them under the control of the wielder and loyal to their commands indefinitely.
People put under the Stone's control will often regain their individuality after receiving a significant blow to the head, or a counter spell by magic, a temporary loss of consciousness will allow their normal mental state to "reset" and return. Th