Tek

An extremely rare personality that is not quite mortal, but not immortal. Has to have a "host" body to exist in the world. Only able to exist without a host by separating the personality, and then storing it.
Extremely intelligent and secretive, usually trying to blend in with common people so it is hidden. A complete boss at nearly everything (usually being bad and selfish) being intelligent, seductive, manipulative, and strong. Don't anger him, he is quick to strike back, and strikes hard.
Resides in ones mind behind the scenes of many actions, and claims to be strong enough that he can destroy the hosts mind by causing it to go insane, therefore Tek is the only semi-stable personality in the body.

If a Tek is lurking around somewhere, we best leave it be.