The placement of functions can be described as below:
Main - "Director" - "Ego"
Serves as the decision maker, putting priori and structure that are related to the perception of reality as their primary thought. The natural talent which is possessed by the human personality as oneself. And it possibly is the most intimate placement that is tied to the human's psyche, too. This placement is characterized by its rigidity, unable to accept that they need to be corrected due to their high sense of ego. It also is resilient, since it's confident about their opinion and idea they believe have to make sense according to themselves. This placement also is passive, since it doesn't have the attachment towards the dynamic action when it comes to accepting others or moving away from their own attachment towards a certain opinion and ergo, it's unlikely for this type to initiate something that has been perceived as working to be changed in the process, and overall, it's orientated by the result of substantial awareness rather than the process on itself.
Traits: Rigid/Resilient/Passive
Secondary - "Explanatory" - "ID"
Serves as a means to express oneself or explore the "world" both externally and internally to elaborate the direction of the dominant function as the main decision maker. It's a part of human pleasure as a creative and adventuring personality in conveying ideas or opinions of others. This function is characterized by its flexibility, which further implies it adapts towards the external stimuli but also to seek for desire within their internal stimuli too. It also is resilient, which also means it doesn't have any struggle in dealing with such matter of its own aspect and excels itself when it comes to such matter. It also is active as this function is one which tends to explore the world according to their
Traits: Flexible/Resilient/Active
Alternative - "Optional" - "Supervised-ID"
Serves as a liaison between auxiliary and inferior functions in dealing with matters related to making decisions, sometimes making their own decisions without considering the dominant function. Not only the identity but also the foundation to support existing functions as a balance in making decisions, whether when it's either difficult or easy in everyday life. This placement is characterized by its rigidity, unable to accept that they need to be corrected due to their high sense of ego. /Vulnerable. This placement also is passive, since it doesn't have the attachment towards the dynamic action when it comes to accepting others or moving away from their own attachment towards a certain opinion and ergo, it's unlikely for this type to initiate something that has been perceived as working to be changed in the process, and overall, it's orientated by the result of substantial awareness rather than the process on itself.
Traits: Rigid/Resilient/Passive
Opposed - "Stepson" - "Supervised-Ego"
Serves as a counterweight and or detecting things that cannot be felt or seen by the dominant as a tool in reaching decisions carried out by the dominant function and also as a function that is contrary to the dominant to work with each other even though in opposite directions like the law of action and reactions to help each other. Correcting the errors that are made by the dominant function as a lesson that can also be applied by their opposed function in advance.
Traits: Flexible/Vulnerable/Active