The story follows a spy who has to “build a family” to execute a mission, not realizing that the girl he adopts as a daughter and the woman he agrees to be in a fake marriage with are a mind reader and an assassin, respectively.
Twilight (黄昏, Tasogare) / Loid Forger (ロイド・フォージャー, Roido Fōjā)
Voiced by: Takuya Eguchi
A spy from Westalis, who has extraordinary combat, memory, and information processing capabilities. He uses various faces and names for each mission, though he is generally known by his code name, “Twilight.” His most recent mission, Operation Strix, requires him to enroll a child in a prestigious school that needs “both parents to be present.” Hence, he creates a false family by adopting Anya and marrying Yor. He is skilled in cooking and cleaning. As “Loid Forger,” he camouflaged himself as a psychiatrist at Berlint General Hospital. Formerly a war orphan, he became a spy to create a “world where children do not cry.”
Thorn Princess (いばら姫, Ibara Hime) / Yor Forger (ヨル・フォージャー, Yoru Fōjā)
A professional assassin nicknamed “Thorn Princess,” who disguises herself as a female employee at Berlint City Hall. Yor’s maiden name before marrying Loid is Briar (ブライア, Buraia). She is 27 years old. She agrees to a fake marriage without knowing Loid’s true background and believes that Anya is his actual daughter from a previous marriage. Being an assassin, Yor is good at cleaning, but not with the other household chores, particularly cooking. Thus, Loid does most of the cooking, though she has recently started learning from her coworker. She has a younger brother named Yuri, who is a civil servant and is a bit too attached to her.
Anya Forger (アーニャ・フォージャー, Ānya Fōjā)
A young girl who can read the thoughts of other people, Anya is the only one who knows the overall situation of her family. She appears to be around 4 or 5 years old, but claims to be 6 as Loid needed to adopt a 6 year old as part of his mission. Originally an experimental human test subject dubbed “Subject 007” (被検体007), she escaped because she was frustrated with a life where she could not behave like a child. She then named herself “Anya.” Due to her ability, Anya is not good with crowds. In addition, because Anya has not received a proper education, she is not good at studying and makes up for it by reading other peoples’ minds for answers. However, it appears she can not use her ability during a new moon. She likes spy anime and thinks anything involving “secrets” and “missions” are exciting.
Bond Forger (ボンド・フォージャー, Bondo Fōjā)
The family’s pet dog, Bond, was originally Project Apple’s canine test subject named “Subject 8” (8号, lit. “Number 8”). He can look into the future which is known and utilized only by Anya through her telepathy. He meets Anya and the Forger family when used in a terrorist bomb attack and then adopted into the Forgers. He dreads Yor’s cooking (as his future sight once showed him that it could kill him) and goes to great lengths to avoid that. He was named after Anya’s favorite cartoon character, Bondman.