PUER/PUELLA ("eternal child", tertiary)
Since this would be the function our egos run to to maintain the dominant attitude, we probably don't project this associated complex onto others. The ego naturally owns it quickly. (Projection would be seeing others as "children" in some way).
The tertiary thus "inflates" itself, aiming to appear full of "wisdom and maturity" and be equal to the dominant or auxiliary of others. Yet then it deflates itself, and I (for instance) become like a child wanting to be taken and led into the innocent past through nostalgic interests. It also tends to "tell us what we want to hear" (for me, relying on what I know to be factually true).
Actually, all conscious complexes tend to inflate themselves. It's actually the ego that is doing the inflating, as it seeks to be the center of the psyche (in place of the Self). So since the tertiary is the ego's first line of defense of the dominant perspective, it seems to be the one that is seen "inflating" the most.
The emotionally positive sense of child-like relief is best captured by the rational mind through:
Se (ENxJ): Looking to be led by others in tangible experiences
Si (INxP): Nostalgic enjoyment of memories, especially childhood
Ne (ESxJ): childlike exploring of alternatives, new possibilities
Ni (ISxP): childlike exploring of underlying significances
Te (ExFP): Finding relief in organizing the environment
Ti (IxFJ): Childlike exploration of logical frameworks
Fe (ExTP): childlike when connecting with others
Fi (IxTJ): Find relief through internal harmony; personally relating to situations represents innocence
Now, we enter the realm of the less conscious complexes; the ones that do get heavily projected onto others, and need to be owned.
When we project the encompassing complexes onto people, they seem to fit those roles, generally involving the function-attitude in that position in some way, and we react oppositionally in kind with that function. Or, they might genuinely be fitting the role in their own behavior.
To own the complex instead of projecting it at others, we must see ourselves as playing those roles; our own worst enemies.
This is hard, because these parts of us are what we have shut out of our consciousness.