It is a very complementary relationship. The 7 is attracted by the tolerance, the support, the generosity, the sense of adaptation, the stability and the listening of the 9. The 9 is attracted by the optimism, the fun, the energy, the enthusiasm, the player and adventurous side of the 7. The 9 likes that the 7 take initiatives because it avoids him to be undecided. 7 likes that the 9 is always ready to follow him in his adventures. Both are open-minded, curious, sociable, sympathetic, idealistic, romantic, and sensual. They do not like conflicts, focus on the positive side of things, get along very well and can be happy to be together.
The fact that both flee conflicts can lead them to neglect important concerns in their relationship. The 9 can see the 7 as being too unpredictable, incoherent, opportunistic, impatient, and egocentric. The 7 can see the 9 as being too indecisive, passive, distracted, lacking initiative, annoying, and stubborn. 7 can become offensive, critical and demeaning when he becomes impatient. This can accentuate the passive-aggressive state of 9 who hates being pressured.