Ref for soul https://www.google.com/search?q=undertale+grey+soul&safe=active&client=ms-android-tmus-us-revc&prmd=ivn&sxsrf=ALeKk03hP-_1VsKAnBMJTcva4Y1JQsyq4A:1620414164738&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjQ_rWVobjwAhXHaM0KHf53ByMQ_AUoAXoECAEQAQ&biw=360&bih=672#imgrc=G7pYpjEicnoBRM

oh-

This is more like a Glitchtale thing, where the human souls are starting to show up again. And now new soul types are popping up, some mixed.