Karl Fritz (Anime)

First Reiss King was the first ruler of the Walls and possessed the Founding Titan which he used to alter humanity's memory.

History
The First Reiss King used his power again to alter humanity's memories, erasing all history of the world prior to a hundred years ago. However, some bloodlines were excluded, such as the Ackermann family and the Oriental clan and they were persecuted because of it.