What's the noun for soulless? Here's the word you're looking for.
soul
(religion) The spirit or essence of a person usually thought to consist of one's thoughts and personality. Often believed to live on after the person's death.
“The capacity for deep empathy is embedded in the very depths of my soul.”
“She knew in her soul that her consort, her love, had no intention of ever returning.”
“Born when spring was in full bloom, you're an earthy soul with a refined sense of beauty.”
soulboy
An adherent of any of a variety of British subcultures of the 1970s and 1980s that focused on soul or funk music and dancing, most notably the Northern soul movement.