>>40951723 (OP)
It's quite simple.
You are you. All of your little whims and desires. The things you want to do, places you want to go, etc. That's all 100% you.
Then comes The Animus. For some, it awakens naturally, for others, it must be forced out, for even fewer still, they are born with it. Most never even come in contact with it, and others dismiss it entirely when it rears its head. The awakening trigger is different person to person, but a brush with death often suffices to bring it to light.
So what is The Animus? Quite simply, it's a higher calling, something that leads you down a path only you can trod. Sometimes it is at complete odds with your own desires, sometimes it is aligned with them completely. It is more than that little voice in your head telling you right from wrong, it is its own sentient entity separate from you, and it views you as its carrier. What
>>40951741 said is more or less apt in this case.
The Animus is an entity you can encounter through introspection, delving into your own will enough, it will seek to bind you to doing its bidding, and this is not always good or always bad. Paradoxically, it cares not for your survival despite you being its host. It is a creature composed of elements of the soul that only seeks to know its standing. If its host (You) Die, then it simply wasn't meant to extend beyond you. If you manage to impart The Animus into the world, all the same. Funnily enough, the ego does not have an ego of its own. It could not care less of the validity of its own path, and if it leads you to death and if that death was meaningful at all, don't mean a damn thing to it.