"For now, these are the pairings, which are staggered a bit in probably an unpredictable way. Lord and muse are the extremes, but aside from that, there's some weird stuff going on. The maid/heir pair are both fully on the passive side, and witch/sylph are fully on the active side. All the others are split between active and passive, but the gap begins to narrow as you progress."

from the discord qna