The soul is not in this dimension. The true soul has to be "attained." When people die, there is not the death of the soul. But the death of the physical body.
You have the physical body, the mental body and the astral body that sustain your life. If you don't have one of these, life cannot exist, like the one you are living now.
When one of these "disconnects," you die in the physical plane. Because every body has a life-supporting function. To reach the soul, you must have these "connected bodies," if one of these is missing, you cannot advance.
Through this you can connect with your "Higher Self," which is not an "identity" but is a "concept," which is connected to your soul. And it cannot be done without all "bodies."
The soul as an "entity" cannot be destroyed or manipulated in this sense. The enemy attacks your soul, or can attack your soul, not directly but indirectly through the "planes" of soul existence.
In very advanced levels, even "just" the astral body cannot be attacked, in the same way as now. The more connection with your soul is present the more power you will have.
Siddhi, extreme wisdom, power to control reincarnation and control of one's life, etc...