This profile takes the two central lines of a hexagram in the reverse order from its companion profile, and it is one of the three Human Design pairings that genuinely reproduce a Chinese structural relation.
The two centres
A hexagram is read as two stacked trigrams. The fifth line is the centre of the upper and, by convention, the ruling position of the figure; the second line is the centre of the lower. Centrality is the strongest favourable marker in classical Yijing commentary, so these two positions are the best regarded of the six.
Correspondence
Commentary holds line two and line five to correspond, one of three such pairs alongside one with four and three with six. Human Design's six profiles whose lines are separated by three positions are exactly those three correspondences taken in both orders, which makes the relation an inheritance rather than a coincidence.
Ordered pairs
The twelve profiles are ordered: the first number and the second come from different parts of the calculated chart, so five and two is a distinct profile from two and five.
The modern layer
The role names on the lines and the reading of a pair as a personality are Ra Uru Hu's, published in 1987. Classical commentary reads the lines as positions in a situation and does not classify people by them. The atlas keeps the two apart.