Board Thread:General Discussion/@comment-29602226-20180531212622/@comment-29602226-20180701133813

There isn't a clear answer. There are several theories...

One theory says that the daughter of a Cursed Swords would be Succubi.

Another theory says that the girls would be born without a sword, but upon growing to adulthood they would pick a mundane sword and infuse it with their own DE in order to become complete.