Clicking his tongue, Ian wasn't really angry. He was just amazed at how His swarm-like intuition in the realm of Spirit Energy was indeed unique, quickly finding the 'backdoor' in an Artificial Soul.
The Soul's Steel Seal, simply put, is an additional Soul Structure added during the creation of an Artificial Soul, achieving a complete distortion of certain thoughts.
For example, never leaking information related to the Swarm, always maintaining a positive and optimistic mindset, and so on...
Though it sounds decent, in reality, it is a terrifying form of thought control.
Being able to guarantee a person's loyalty and maintain their mindset means being able to freely shape and change their mind. From then on, thoughts and soul were no longer free entities belonging only to oneself, but 'wealth' manipulated in the palm of the Swarm.