Soulless are Mobians or Humans that have had half of their souls taken by Zielo and are twisted to his every will. According to Antoine D'Coolette and Bernadette the Hedgehog respectively, Soulless are silently suffering from the pain of their souls slowly reducing into nothing and can be described as "punished slaves".

Soulless are also known as mindless beings that serve Zielo, where their soul become no longer their own.