Atum resembles a humanoid robot that allows Terence to remove souls from a persons body and store them in dolls, before this process is done the person must play a game and lose in it. This dolls are very much alive and seem to be able to talk and even ask for Terence to play with them, he when as far as to dress them.
Atum second ability allows Terence to ask questions to the soul and which a person must answer, it the person lies the color of their aura changes which alert him that their lying.