In the Sanguine-Phlegmatic, sanguine expansion rules and phlegmatic stability serves it. The cost of breaking an established configuration, which is the mark of the phlegmatic, comes to protect belonging, which is the good of the sanguine. The result is adaptive belonging. The image is the sunflower, which turns and adjusts itself to keep facing what warms it.
The Sanguine-Phlegmatic tends to adjust tastes, routine, language, habits, and preferences to stay within the bond or the group, and this adaptation can become so genuine that they themselves struggle to tell what they always wanted from what they adapted to. Small changes in themselves cost them less than breaking the tie. In my observation, this adaptation can coexist with a surprising tolerance for turbulent relationships.
Their inverse pair is the Phlegmatic-Sanguine, and the two can seem equally adaptable. The question that separates them is this: does the self adapt to preserve belonging, or is the environment rearranged to preserve a livable life? The Sanguine-Phlegmatic changes themselves to stay inside; the Phlegmatic-Sanguine may change place, job, or company to live in peace again.
The good proper to this form is a continuity of bond able to get through ordinary differences, a plasticity that protects relationships without requiring every disagreement to become a separation. The temptation proper to it is adaptation that dissolves: the person gives in, adjusts, and takes on until they no longer know where flexibility ended and the loss of their own position began, and they may even betray a commitment, a truth, or a limit they recognize as due, so as not to be left out. Under coercion, fear, or dependence, however, this loss calls for understanding and help, not accusation.
The mature form of the Sanguine-Phlegmatic is to belong without dissolving. They learn to distinguish giving way on form from giving way on what is essential, keep adjusting what can be adjusted out of love for others, and discover that a bond that survives only at the expense of truth was no longer the belonging they were looking for.