[by timeless:] 6-1-3. That means they have the core desires of a 6, they interact with the world like a 1 and they like to be seen like a 3 would like to be seen. Breaking that down:
Type 6 is security-oriented, and can alternate between serious doubt and serious loyalty. They tend to be pretty rule-focused right off the bat (as they are a superego type) but then add 1 onto the mix and, like that tri-type description gives you, they can get fixated on constructing appropriate rules. Type 1 is usually critical of themselves and others, which is the component that enables a Type 6 to channel their desire for a workable rule set into the desire to create a workable rule set. Type 3, the image type in this triad, likes to be seen as successful and effective. You can see how adding 6, 1 and 3 together would create a personality type that's dedicated toward seeking out the best rule set.
613 The Taskmaster. Discerning and focused 6. This is the most industrious 6. Eager beavers and highly responsible, they are always busy and can be mistaken for 3s. Fear is managed by achieving. They tend to feel the burden of obligation. They focus on duty and family.
The core fears are of fear itself, danger, being alone, cowardice, submitting, deviance, uncertainty, being targeted, chaos, being wrong, bad, evil, angry, inappropriate, corruptible, condemned, failure, being incapable, or unable to do, inefficient, immutable, and inconsequential.