Also known as: フィオナ・フロスト, 夜帷(SPY×FAMILY), フィオナ
A deuteragonist from Spy X Family.
She is a spy working for W.I.S.E. under the code name of "Nightfall" and was trained by Twilight (Spy X Family). She is always desperate to win his love, even to the point of wanting to replace Yor Briar. As a result, Nightfall serves as an antithesis to Yor.
