Fiona Frost

After being trained by Twilight to hide her true emotions, Fiona tends to remain emotionless on the surface—even when making a mental confession of love to Loid.[4] Fiona is deeply in love with Loid, to the point of being capable of compromising Operation Strix by visiting the Forger's residence and even telling Sylvia Sherwood and Loid himself to replace Yor and let her take over the role of the Forger wife. Fiona thinks of herself as the superior partner to Loid and wishes to separate him from Yor so they can be together. To others, like her co-workers, Fiona is seen as an unscrupulous and ambitious woman, capable of backstabbing her peers to build a reputation even bigger than Twilight's own. While this is true to an extent, her desire to build her reputation stems not from a lack of scruples or ambition per-se, but from a desire to impress Loid.