Fiona Frost

"What a wonderful man you are, Twilight. I'll achieve peace between East and West. And I’ll do it all for you."

- Fiona thinking about Loid Forger

Fiona Frost (フィオナ・フロスト) is a spy for WISE who acts under the codename "Nightfall" (〈〉). She works undercover as an assistant to Loid Forger at Berlint General Hospital to provide him with mission details.

Appearance
Fiona is a pale woman of average height with bobbed hair of a light lavender color and a long fringe covering much of the right side of her face, worn swept behind her left ear. She has cold purple eyes framed by light-colored eyelashes, and most often is seen wearing an emotionless expression. She is described as beautiful by Yor Forger.

Fiona is introduced wearing a duffel coat with a black turtleneck and pants underneath, and her outfit when visiting the Forgers' house consists of a black blazer and a low-dip light shirt. Her stud earrings take the shape of WISE's symbol.

Personality
After being trained by Loid Forger to hide her true emotions, Fiona tends to remain emotionless on the surface—even when making a mental confession of love to Loid she kept her stone-cold face plastered on. She thinks of herself as the superior partner to Loid and wishes to separate him from Yor Forger so they can be together.

Abilities and Skills
Poker Face: Fiona is able to conceal all of her emotions, making it impossible for anyone to tell what emotion she is feeling. At all times she has a stone-cold look on her face whether she's happy, upset, angry, or even proposing her love.

Physical Strength: Fiona has massive physical strength, shown when she took multiple opponents in tennis and, to some degree, even managed to rally a shot by Yor.

Loid Forger
Twilight served as a mentor during her training as a spy, teaching her to bury her emotions and show no weaknesses. Likely because of the time she spent with him, Fiona's respect for Twilight turned to love and now has a certain ambition to become his wife in place of Yor, whom she deems unsuitable for such an important role.

Yor Forger
Fiona believes Yor is lacking as Loid's wife and is jealous of the fact that a woman far less skilled than her in being a wife gets to be his wife and that Yor can manage to evoke some genuine positive emotion from Loid when in his company.

Anya Forger
Fiona believes that Anya is not raised strictly enough, and under her (very painful) guidance, she can be made into a Stella Star procurement machine.

Chapter Appearances

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Anime Appearances

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Trivia

 * The name Nafalia Foney she made up the tennis tournament is derived from her agent codename "Nightfall" (same for Twilight's alias Twain). In Japanese, she used the name "Tobarī" (トバリー) which is also a derivation of her Japanese codename, "Tobari".
 * The fake last name, Foney, is a humorous nod toward the "phony couple" they were acting as.
 * Nightfall's chair, featured on the cover of the sixth volume, is a Panton Heart Cone.

Quotes

 * (To herself, after seeing Twilight’s serious mode): “There it is. That’s the Twilight who won my heart. The Twilight I can’t stop chasing. The Twilight I want at my side. The Twilight who turned my respect into love. The Twilight whose dreams became my dreams. What I’m saying is… I love you”.