User blog comment:IamJakuhoRaikoben/Chapter 482: Vigor, Review./@comment-7418318-20160419083333

Leaving aside if or how she's related with Erza, I hope this Lady Eileen turns out to be someone who fought against the Spriggans and earned their (or at least Neinhart's) respect in that fight, rather than a member of the Spriggans.

Maybe she opposed the absorbtion of her guild/country into Alvarez, or she held Zeref responsible for Erza's abduction and somehow found out that Emperor Spriggan is Zeref.

And then in the battle it took two or more Spriggans to overcome her and that earned her the posthumous respect of her opponents.