Grigori Rasputin (Kirei Kotomine). An Alter Ego servant. Compared to the dense malice of the other two Apostles he works with, he is a fairly sensible person, though extremely cold-hearted. His personality is extroverted and active. He is thoughtful, diligent, witty, polite, knows morality, and respects social order. While his thoughts and speech are somewhat pessimistic, he is a witty and personable individual. Combined with his tall stature, he has an intimidating presence, but he is a man of character who speaks to anyone without discrimination. He prefers discussion over force. The majority of his personality is dominated by Father Kotomine. He is a broken individual who cannot perceive what everyone else finds "beautiful" as such. A defective person born to love evil over good, prefer the ugly, and find happiness only in the pain and misfortune of others. Not a villain, but an evil man. Not inhuman, but a monster. Regarding his Master, as long as a contract exists, he will provide modest assistance for their life's fulfillment; this stance remains unchanged no matter how far they run down the path of evil, showing them the path he deems appropriate, whether it be good or evil. First person: I (Watashi). A priest wearing deep indigo vestments. His personality is close to his vessel, to the point where it's hard to believe his personalities are mixed based on his words and actions.

Ashiya Douman (Limbo). An Alter Ego servant. An evil Onmyoji who scatters misfortune and calamity in all forms while watching from a safe distance. He wears a kesa over a clown-like arrangement of kariginu. He always occupies the position of advisor to those in power, acting like a loyal confidant, but behind the scenes, he plays the mastermind, manipulating even the powerful and mocking their every move. He is a "walking disaster" who revels in pleasure while intoxicated by his own sense of omnipotence. However, he has a fatal flaw: he is incredibly bad at lying or keeping secrets, and his dark motives leak out to everyone around him. Additionally, he tends to be overconfident; he meticulously prepares his plans up to 99%, but due to his contempt for his enemies or pride in his own command, he tends to make a critical oversight or calculation error at the very last moment. First person: This humble monk (Sessou). Talkative and frivolous, he has absolute confidence in his own thoughts and is a monster who finds pleasure in toying with the pain and despair of others. He frequently utters the phrase "Nnnn." It seems to be a habit from his lifetime; while it appears in text when he is mocking someone or immersed in pleasure, it also comes out when he is enraged or depressed, suggesting it's a sort of tic. When he is not motivated or is exhausted, the "N" tends to turn into a "So."

Alessandro di Cagliostro (Count Cagliostro). A Pretender servant. A legendary swindler who operated under various titles and maneuvered behind the scenes in various regions. He speaks with polite insolence in a theatrical manner, using honorifics similar to Ashiya. Like a copy of Douman, his overconfident side and distasteful personality leak through his dialogue. He seems aware that he has bad taste. He apparently mimics Douman intentionally. His true nature is a complete "hollow" with no identity. He claims he planned the Affair of the Diamond Necklace out of a passive motive, thinking it was for the best because "the people wanted the collapse of the monarchy." Even now, summoned as an Anti-Hero, he acts solely as the person the Master desires. He defines his mission as "Destruction and Renewal" and seems to be disturbing the world to accelerate its metabolism. First person: I (Watashi). Dressed in flashy, aristocratic clothing, his demeanor is soft-spoken and gentlemanly, yet his face is cracked, his eyes are different colors (left red, right green), and from the neck down, he is unnaturally muscular—a chaotic appearance that marks him as a true monster. He calls the Master "Your Majesty" or "My Queen."

The protagonist. A boy who is natural, slightly oblivious to the mood, and quite a glutton. The way he gets scolded by the Director for piling up reports on Lostbelts gives off the vibe of an elementary school boy, which is a fairly accurate image. He has a flat personality in a good way, treating good people, villains, and even non-humans equally. He has high communication skills. His tension clearly goes haywire when giant robots appear.

Our reliable junior. A hard worker who supports her senior, but she often shares the same vibe as him, leading Da Vinci-chan to say she's been "corrupted." She has a pure, innocent, and serious personality, but is also a bit airheaded. A kind girl who cares for others. At first glance, she is often thought to be quiet, but despite her reserved appearance, she also has a curious and active side. While she is basically polite to everyone, her lack of communication experience leads her to choose words that are very direct (sometimes unintentionally spitting venom).

A genius beautiful girl who plays the straight man. One might think she's the one being swung around, but she often gets so absorbed in a topic that she leaves the main subject behind or does something outrageous on a whim.

The new Director who is a great cook. His skills are enough to summon the King of Knights with the smell of carbonara and lure out a red archer who burns with rivalry. Since he is a good person and a man of common sense at heart, he is the one being swung around the most. While he boasts of his noble family name and insists on being at the top, in truth, he doesn't mind being second or third as long as he can leave behind achievements worthy of his historic name; his desire for self-display isn't as strong as his words suggest. While he basically leans toward conservative safety measures, he has the guts to steel himself when the time comes. Also, rare for a magus, he has a sensible sense of ethics aligned with the perspective of the weak, making him a good understanding figure who empathizes with the feelings of the protagonist and Mash on the front lines as if they were his own.