User blog comment:Gourgeist/Shingeki no Kyojin Chapter 66 Review: Wish/@comment-205.154.150.225-20150211223346/@comment-99.120.99.33-20150217010810

The Shifter's powers did pass down to three factions. One being the Reiss family, the others being the Ackermans and the Asian Clans. However, I have a feeling the leader outside the walls could be from the Ackerman Bloodline like Kenny, Levi and Mikasa. He/She were angered with the Reiss Family's persecution of both his/her family and their allies. Maybe there's still a possibility that Isayama could bring this to light.