User blog comment:Gundam Legilis/Spoilers and Images/@comment-11188061-20140501154402/@comment-6695376-20140501155630

Monty's text on Facebook:

"guess what? I announced Ruby's name in a tweet Same for Weiss.

Emerald is just a name not a plot point"

Well maybe we still can't say its official, but lmost sure thats IS her name. ^^