Board Thread:General Discussion/@comment-2A02:C7F:7079:CA00:C5CF:C7FE:DD8B:A69F-20180313220326

It says that Sembalnce's are unique special abilities and everyone has a different one and yet Winter and Weiss' Semblances are identical. At first I suspected that it's because they were sisters however Ruby and Yang's semblances aren't linked despite being half-sisters, Does anyone have any theory as to why Winter and Weiss' Semblances are identical? 