Inner Self is a term used by Emanuel Swedenborg, Paul Foster Case and in the Grimes translatation of the Crest-Jewel of Wisdom to refer to Spiritual Ego.
Spiritual Ego > Ajayu, Angel, Atman, Augoeides, Blazing Star, Brahman, Bright Light, Buddha Nature, Deep Self, Divine Ego, Father in Heaven, Genuine Self, God Self, Great Self, Guardian Angel, Higher Genius, Higher Self, Highest Self, Holy Spirit, Immortal Spirit, Inner Radar, Inner Self, Inner-Self, Intensification of Consciousness, Kra, La, Monad, Monadic Consciousness, Monadic Intensification, Neshamah, Ohr, Original Face, Paramatman, Real Ego, Real Self, Sakshi Chaitanya, Saug, Self, Soul, Spirit, Super Ego, Supreme Self, The Knower, The Witness, Transcendental Self, True Self, Unconsciousness, Universal Being, Universal Deity, Universal Self... further results
According to Swedenborg,
It is the inner self that is called a spiritual self because it is in heaven’s light, and that light is spiritual. It is the outer self that is called an earthly self because it is in the light of this world, and that light is earthly. Anyone whose inner level is in heaven’s light and whose outer level is in this world’s light is a spiritual individual in both respects, but people whose inner level is not in heaven’s light but in this world’s light, where their outer level is as well, are earthly individuals in both respects. Spiritual individuals are the ones called “living” in the Word, while earthly individuals are the ones called “dead.” (Swedenborg, 2016: 3:38).
"That (correct knowledge) only is attained by right discrimination between the Self and not-self. Therefore, discrimination must be made between the inner Self and the non-real individual (205). 
- ↑ Case, Paul Foster. Wisdom of Tarot. Boston: Rosicrucian Order of the Golden Dawn, 2009.
- ↑ ———. The Vivekacudamani of Sankaracarya Bhagavatpada. Edited by John Grimes. Routledge: Amazon Digital Services, 2001. https://www.amazon.com/gp/product/B079QKM91M/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B079QKM91M&linkCode=as2&tag=lightningpa02-20&linkId=098e1d41298dd714ecb3c35227699c8e.