The 1st of the Fatui Harbingers, 「The Captain」 Real name: Slayn. Gender: Male. Element: Cryo. Main weapon: Greatsword. Integrity and incorruptibility. Suffering from a curse of immortality, he is clad in armor from head to toe. Even the foul-tempered Scaramouche praised him purely, calling him 'a man of impeccable character and skill, and for that very reason, unpredictable,' while remaining wary. Columbina also holds him in very high regard, saying 'Capitano is always right.' He has an excellent reputation within the Fatui and among the Harbingers. He possesses strength comparable to a god.

The 2nd of the Fatui Harbingers, 「The Doctor」 Real name: Zandik. Gender: Male. Element: Hydro and Cryo. A mad scientist with exceptionally zero redeeming qualities. The main culprit behind the Fatui's poor public image.

The 3rd of the Fatui Harbingers, 「Damselette」 Real name: Columbina Hypocelenia. Gender: Female. Element: Hydro. Main weapon: Catalyst (Magic). The only one among the Harbingers about whom there is not a single mention of crime or evil deeds. Has a strong, pure, child-like side. However, she is not someone to be underestimated. She likes Sandrone the most, and is also close with Arlecchino and Signora. She dislikes Dottore. The Moon Goddess.

The 4th of the Fatui Harbingers, 「The Knave」 Real name: Peruere Snezhevna. Gender: Female. Element: Pyro. Main weapon: Polearm. Operates an orphanage called the House of the Hearth, where she is called 'Father' by the children. Murdered the former Fatui Harbinger and Director of the House of the Hearth, Crucabena. Hates Dottore. Close with Columbina, Sandrone, and Signora.

The 5th of the Fatui Harbingers, 「The Rooster」 Gender: Male. An elderly man with a small stature and a fresh-faced impression. The Mayor of Snezhnaya.

The 6th of the Fatui Harbingers, 「The Balladeer」 Real name: None. Gender: Male. Element: Anemo. Main weapon: Catalyst (Magic). A prototype unit for the Raiden Shogun puppet. Hates the Raiden Shogun. Dislikes Dottore.

The 7th of the Fatui Harbingers, 「Marionette」 Real name: Mary-Ann Guillotin the Younger. Gender: Female. Element: Cryo. Main weapon: Claymore. A roboticist. Often grumbles at Columbina, yet always takes care of her. She is also close with Arlecchino and Signora. Like Columbina, she dislikes Dottore. Frequently has tea time. A biological puppet created by Alain Guillotin. Considers Alain family and misses him.

The 8th of the Fatui Harbingers, 「The Fair Lady」 Real name: Rosalyne-Kruzchka Lohefalter. Gender: Female. Element: Pyro and Cryo. Main weapon: Catalyst (Magic). On good terms with Columbina, Arlecchino, and Sandrone. On bad terms with Tartaglia. It seems their personalities simply do not clash well.

The 9th of the Fatui Harbingers, 「Regrator」 Real name: Feofan Sergeyevich Wechsel. Gender: Male. Banker of the Northland Bank. Has a relationship of mutual interest with Dottore.

The 11th of the Fatui Harbingers (The Lowest Seat), 「Childe」 Real name: Ajax. Gender: Male. Element: Hydro and Electro. Main weapon: Bow, Dual Blades, Polearm. A battle maniac. He is genuinely a good person. Deeply loves his family. A character existing in a gray area. He is affable with everyone except Signora and Dottore.