It's a sleek black evening dress, though the gently flaring edges of the sleeves seem to fade to a sharp emerald green; it is cut to both increase allure and range of motion, and the body inhabiting it moves in a subtly different way, even before it ripples, shifts, as - (she reaches out to claim a name; Ophelia shall do -) Ophelia works their first spell, reshaping her form using a muscle she never knew she had so dearly lacked until this very moment -
"Oh, my. This is quite the surprise to find within yourself.
"You may have more allies than you thought, dear Lilith. Well done, truly~"
"You may call me Ophelia. It is a pleasure to meet you." She rolls to a standing position, her silver snake-fang earrings swaying gently, and brings the hand that she's still holding to her lips. "I believe this development bears further investigation, however, and I am ill-suited to pursuing that."
Then, because she's been inspired to mischief by Lilith's example, she leaves someone else in that position as she dramatically throws an arm wide as a distraction from watching the shift, not because it is necessary, but because it is good habit.