User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170318161107/@comment-73.160.58.215-20170318192735

Okay, so just noticed that her name should be Millarca Vordenburg. It, like Elmenhilde's last name, comes from the play "Carmilla". Her first name is anagram of Carmilla, and an alternate name she uses. Her surname is the family name of the "hero" that supposedly subjugated Carmilla (then going by the name Countess Mircalla Karnstein) in the past, but was also rumored to have become her lover after falling for her.

Oh, and just to let you know, the new Aces should be named Diethelm Waldseemüller, Nero Raimondi, and Milana Shatalova. There is no indication of an alternate "Deethelm" spelling from the original katakana (in fact, it is spelled such that it changes the 'de' kana into 'di'). As for Milana, her name is clearly Russian and I don't see any alternatives that would result in how it is currently being spelled. That instead seems to just be using romaji without any special characters.