Board Thread:General Discussion/@comment-112.200.43.123-20131209094415

I had visited the wiki just a few days ago, and I know I read 17 as the age of Blake and Weiss, and 15 as Ruby's age.

Then today I found that they've become younger by two years, and Yang stays 17.

Just curious. Is there an official source for that? (because honestly I find them really young that way) 