Answer :
Dr. Jekyll is the villainous Mr. Hyde's alter ego (see Examples in Literature). These are obviously just a few examples of the alter egos that appear in fiction.
Is the other half a friend?
The person you are closest to and who shares your distinct worldview is your alter ego. He or she nearly appears like an integral part of you. The noun alter ego can be used to refer to your closest buddy, the person who knows you the best.
Why does alter ego happen?
Stressors may cause the alter personalities to emerge. The different alter personalities could reject one another, fight, be antagonistic to one another, or refuse to acknowledge the others.
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