Multiple Minds

Alter Ego, also called Multiple Minds or Duality is the presence of multiple personalities within one mind. One with this ability may be docile and harmless while one ego is present, but powerful and vicious while another ego is present. And perhaps an ego may be invoked based on what type of persona or knowledge the user thinks the current situation requires (called Jungian Shift). It is also possible that each personality comes with a distinct ability or distinct traces (scent, fingerprints, etc.), and/or even a different form based on which personality is active.