User blog comment:IamJakuhoRaikoben/Chapter 442: The Law of Space, Review./@comment-1153699-20150629150307/@comment-1153699-20150629161032

The letter μ that appears after her name is the 12th letter of the Greek alphabet. Hiro pretty much tells us she's the weakest out of the Spriggans.

I'm not underestimating the power of the Ishgal Gods at all. But at the end of the day, FT are obviously gonna fight these Spriggans. If the weakest of them is stronger than DF Natsu and DF Gray fighting together, how would FT fare against the entire empire?

Even if all the guilds in Ishgal and the 10 WSs join FT, they still won't win. The guild members of Sabertooth, Lamia Scale and all the other guilds didn't get anywhere near as much improvement as FT members got after all.