Ariadne Steelgarter

Lady Ariadne Steelgarter is an English noblewoman. Physically, her most notable attributes are an extra set of arms, along with blue hair. Socially, she is described as being a great patron of the sciences. It is not yet entirely clear if she herself is a Spark, but when the subject of discussion turns to fashion, she certainly displays the proper level of enthusiasm and focus.

Agatha and Ariadne first meet in the Londinium headquarters of the Queen's Society, in the lead-up to a soiree which Aradne is hosting for that illustrious organization. She takes Agatha in hand, dress-wise, saying that whatever disinterest Agatha may have in the subject, as an official guest of Queen Albia, she has to look the part. Fortunately, Agatha brought along a few odds and ends from Paris, and when a squeeing Ariadne announces that Agatha needs a maid to deal with all of them, Violetta shows that she's probably up to the task...

Possibly Useful Information
Boris Dolokhov also has four arms. Whether he and Lady Steelgarter share any background remains to be seen.

"Ariadne" may be a reference to the character of the same name from Greek mythology, who is sometimes associated with thread.