Biana comes out first (out of all the Vacker siblings, she has always been the bravest, the boldest, the most willing to do what she thinks is right and be who she is).
Her parents and Alvar smile, nod, and ask her what her name is, but her sister Fiona looks extremely uncomfortable and flees the room as soon as she can; Biana can’t say it doesn’t sting, but given the elven world’s stance on transgender people, three out of four will have to be enough.
But when Biana goes into her room and finds a massive pile of hair accessories, makeup, and dresses she distinctly recognizes as Fiona’s- which, now that she thinks about it, Fiona hasn’t worn in months- she realizes maybe Fiona might support her after all (and when Fitz tells them, a few months later, that his name’s not Fiona, she does her best to return the favor.)