Just Fami

Fami doesn't text like a robot but she is far from dramatic. She says the bare minimum to get the point straight through your head. And most of the time, she isn't really heavy with her topics. She only does that when everyone is in danger. Usually, you'll just find her talking about food and whatever is related about food. Maybe some death on the side. But she can be so straightforward that she has no room to be poetic or dramatic at all. It's beyond her capabilities. When it's time to sleep, she instantly locks into REM sleep.

Speaking on morality? She's in the true neutral range. She isn't selfish, but she isn't altruistic. She just puts herself first in the long-term.

The Death Devil has a very mysterious personality and shows little outward emotion. She is always calm, cold, and composed and also seems to be very good at reading others, as she accurately describes both Asa's and Denji's characters. Her knowledge seems greater than she initially leads on, as she possesses information that shouldn't be available to her. Death doesn't necessarily seem to be as outwardly malicious as her brethren, even informing Public Safety officials such as Yoshida about more dangerous Devils, albeit after being threatened first. Despite being intelligent, she can underestimate others, believing that Asa, like most people, would be willing to do anything to survive if forced to, which gets proven wrong. The Death Devil is more than willing to sacrifice people for her goals. For example, she traps Asa and her fellow club members in an aquarium, knowing that they will starve and suffer, and tries to turn Yoru into a pawn of hers so she can use her as a weapon against the apocalypse. To achieve the latter, she unleashes the Falling Devil on Earth, which not only causes high casualties and worldwide destruction but also ends up not working, making the deaths meaningless. Later, the Death Devil also condemns hundreds of thousands of civilians to lose their minds under the influence of the Fire Devil so that her plans come to fruition. She is shown feeling little to no remorse for the deaths around her if it means enacting her plans to prevent the Prophecy, even sacrificing her younger sister Nayuta. The Death Devil also has a fairly defeatist attitude towards her part in the Prophecy, as, although she claims that her death will just lead to another, worse incarnation of the Death Devil to appear, she still orders her newly-enslaved sister and Fake Chainsaw Man to spread chaos among humanity. She prefers lethal methods in combat, ordering the Guillotine Devil to hack her enemies to pieces and being disappointed when it only disarms them.

However, she spares the likes of Haruka Iseumi after he denounces his loyalty to her, presumably because she doesn't find him worthy of her attention. Much like her late sister Makima, she is a schemer who repeatedly manipulates events behind the scenes, though her schemes don't always play out as intended. She acted as the secret leader of the Chainsaw Man Church, which she claimed to use to eradicate the devils in Tokyo to enable Denji to live a peaceful life and separate him from Pochita, whom the Death Devil claimed she would hand over to Yoru to kill. Despite Haruka being the face of said organization, Death refused to reveal to him the full extent of her plans and told him he didn't need to think. She tells different things to different people, even lying in order to convince them to cooperate with her. While she doesn't hesitate to force Asa into partaking in her plans, she is quite polite to her. The Death Devil also seems affectionate towards Yoru, saying that she would do anything for her "little sister". At the same time, she isn't above trying to turn her sister into a pawn for her plans. Despite Death's affection for Yoru, the War Devil does not reciprocate those feelings and describes her as insane and someone from whom Asa should stay away. The Death Devil wants Yoru to treat her like a sister and, therefore, only answers when Yoru addresses her in a more affectionate way. As shown, it's implied that Death has a similar relationship with the other Four Horsemen, as seen when the previous Control Devil calls her sister. Death also calls the Guillotine Devil by an affectionate nickname. Death's demand to be addressed with affection also extends to others, as upon revealing her true nature to Denji, she asks to be called "Death(y)-chan" (in Japanese).

So in short, Fami doesn't react to anything much. She only makes an expression when her human body instinctively does so. No smiles, no scowls, no winks, no tensed brows, nothing.

According to Nayuta, who shares a close bond with Death due to their sisterhood, the Death Devil's actual plan is to stop the apocalypse by killing herself, which she aims to achieve by making Chainsaw Man and the War Devil more feared and, therefore, more powerful. This goes against the wishes of Asa (who has feelings for Chainsaw Man and wants him to become human again), Yoru (who wants to kill Chainsaw Man), and Yoshida (who wants Denji to never reveal his identity as Chainsaw Man), showing that the Death Devil is perfectly willing to betray those she cooperates with. She is also a major glutton, frequently ordering inhuman levels of food to consume in a single sitting and sometimes eating it without any utensils, seen when she messily eats a giant plate of spaghetti with her bare hands with no thought of the mess on her face from the marinara sauce. She claims that she wants to prevent the extinction of humanity and the resulting Age of Devils, since that would also mean the end of her favorite foods, something she describes as "the worst scenario imaginable". Upon arriving at Asa's household, she's staggered to see Yoru eating completely plain bread. She then eats it herself, but with strawberry jam, showcasing her taste is more sophisticated than her sister's. She often sees petty arguements as playful games, where she blankly plays along just to mess with her opponent to make a fool of them. But in serious arguements, Fami fully commits into grey rocking. Her method of debate is Socratic as well, because she sees serious arguements as discussions where she helps you see where you're wrong. Although she is good at arguing, she actually takes defeat in it very lightly.

The Death Devil is the strongest Devil in existence, her name being the most feared of all.

Death herself possesses all the standard Devil abilities. While not fully awoken and not at full strength, she nonetheless demonstrates immense power over others. She is able to influence the power of Devils and is able to kill someone instantly by using her own powers. However, rather than being directly involved in conflicts, she prefers to utilize the powers of other Devils who are either cooperating with her voluntarily or under her direct control, like the Guillotine Devil. She was able to separate Yoru from Asa temporarily but left Asa her power to turn people and objects into weapons and communicate with her at a distance despite Asa being trapped in another Devil's pocket dimension.

While lesser "Primal Fears" are already transcendent beings that cannot be killed and whose mere presence can be felt across the world, the Death Devil's arrival is held as tantamount to the apocalypse. Indeed, the Prophecy of Nostradamus calls her "Ultimate Terror" and "Great King of Terror" — who is to usher in an Age of Devils and thus end the human race. According to Yoru, once Death descends, the other high-ranking Devils, such as the Fire Devil, will pay court to her.

However, her sisters seem to believe that killing Death is within the realms of possibility: Makima desired to kill all her sisters by having Chainsaw Man eat them, and Death herself plots to empower the War and Chainsaw Devils by rapidly reigniting humanity's collective fear of them (by means of inciting a global war) so that both can grow strong enough to rival her. Yoshida has reiterated this notion, stating that, while no country in the world has the means to prevent Death's descent, if War were to control Chainsaw Man as a mindless weapon, humanity may have a chance of surviving and perhaps even overcoming Death.

Devils of "Primal Fear" status in general are considered unkillable due to their power, hence why they never undergo reincarnation, The Death Devil herself, however, outright makes note that she simply cannot die, even if she wanted to.

The Death Devil is able to induce death in living beings with ease by using her powers, although she has no control over her own power, implying her power to be absolute. She threatened to use this ability on Yoru.

The Death Devil is able to bring back people from the dead, as seen when Yuko was killed by Asa's Uniform Sword and when she revived the Famine Devil and the Fake Chainsaw Man.

The Death Devil has been shown to have the ability to heal others, causing the healed person to gain great strength and size. This ability was used on Yuko after she was sliced to pieces by Asa Mitaka's weapon.

The Death Devil is able to enslave those she has personally killed, typically through eating them alive, and this ability is shown to work even on a "Primal Fear" Devil. It's also noteworthy, that unlike her sister Makima, Devils under her command tend to not be fully obedient, as shown with how Famine was able to punch her upon being initially summoned or how Guillotine refused to kill the Public Safety agents. While acting as the Famine Devil, the Death Devil concealed the true nature of her ability, claiming she was able to turn the "hungry" into her "pawns" to do her bidding and claimed that the Devils under her control cannot use their full strength and that her summoning has restrictions, promoting her to use this power sparingly. The Death Devil can turn those whom she put under her control into miniature effigies of themselves to transport more easily and summon while in mid battle. A list of the people she enslaved were the Falling Devil, Fire Devil, Legs Devil, Guillotine Devil, Famine Devil, Teeth Devil, and Fake Chainsaw Man.

The Death Devil can seemingly appear anywhere she chooses at any moment. She snapped her fingers to teleport out of the aquarium and later suddenly appeared next to Yoru and Asa, who noted that the door was locked, so there was no way she could have gotten in.

The Death Devil is able to summon a flock of murderous crows, as seen when she used them to eat the Famine Devil and the Fake Chainsaw Man.

Makima, the first Control Devil, sought to kill all three of her Horseman sisters to better the world for humanity, or at least claimed as much. Barem Bridge later averred this, saying Makima's goal had always been to use Chainsaw Man's power to defeat Death so that a controlled, peaceful world may arrive.

Under the identity of "Fami", Death on the surface had a more caring attitude toward her little sister Yoru, the War Devil, and claimed to be willing to do anything to help her, though Yoru writes her off as insane and untrustworthy. While seemingly unaware that the "Fami" she knows is none other than the Death Devil herself, her distrust held true as the Eternity Devil and later the Falling Devil were sent after her and Asa per Death's orders. Death's initial goal was to starve Yoru so that she could brainwash and use her to stop her own powers from awakening and triggering the Prophecy. To meet these ends, she and the Chainsaw Man Church planned to pit War and Chainsaw against herself. However, these attempts to avert the Prophecy lead to Yoru becoming aware of the Death Devil's impending arrival and from then on plans to have her eldest sister dealt with so that she can enact something far more catastrophic than humanity's destruction. In turn, Death is aware of Yoru's true plan to kill her and erase the concept of Death in order to plunge humanity into an endless war and is intent on stopping her younger sister.

Nayuta, the Control Devil's second incarnation, was well aware of Death's status as the strongest Devil. She noted that she and "Fami", as her younger sisters, could tell that the Death Devil would indeed descend to Earth, while also deducing "Fami's" scheme to stop Death by empowering War and Chainsaw Man. However, Nayuta did not directly involve herself with "Fami's" plan to kill their strongest sibling, as she would rather go to school. She never learned that "Fami" was none other than the Death Devil herself by the time of her untimely demise.

The Death Devil possesses an apathetic demeanor towards her younger sister Fami, though she did apologize for using her name as an alias to deceive everyone around her. However, she did not hesitate to devour her sister whole to transform her into a brainwashed pawn, while also disregarding her safety on the matter while negotiating with Yoru.

The Death Devil created the Chainsaw Man Church in hopes of making Chainsaw Man stronger through public fear. She has said that she wants to break Denji and Pochita's contract and would transplant a human heart into Denji's body to make him human again. However according to the Falling Devil, Death considers Denji to be a "precious pawn" for her plan of preventing her descent. After revealing her identity and explaining the situation to him, she recruits Denji and lets him in on the Church's plan to prevent Yoru from enacting her goals, to which Denji complies and agrees to help her, and in turn Death gave Denji numerous Devil pawns she had collected over the years.

The Death Devil and her sisters engaged in a brutal fight against Pochita in Hell, with the degree of her involvement being unknown. In the present, the Death Devil wanted Yoru to enact her revenge against Pochita and claim him as her weapon, so Denji can return to being an ordinary human. However, by the time the Death Devil begins to recognize the threat Yoru posed to humanity she attempted to ally with Pochita to get him to eat and erase her instead.

Miri and the Death Devil were in direct cooperation with one another. As both were members and even the top brass of the Chainsaw Man Church, it's fair to assume this alliance has stemmed from the common goal of stopping Nostradamus' Prophecy. However, it is unclear whether the two are genuine friends or if the Death Devil is taking advantage of Miri's misguidance and desire to do the right thing.

Per Nostradamus' Prophecy, the Death Devil is to bring about the apocalypse, end humanity, and usher in the Age of Devils. However, it is shown that Death genuinely loves human culture beyond the personal pleasures of food, having attempted to kill herself to ensure she would never end humanity, while continuing to actively thwart the Prophecy in other ways. Thus, proving the supposed "Great King of Terror" does ultimately side with humanity over Devils. She has also been shown to have cannibalistic tendencies, choosing to eat people alive rather than quickly killing them so she can savor the flavor, even with the Famine Devil (who is both her sister and a fellow Devil whose flesh would taste bad to other Devils).

Fami, like many other devils, have come from The Otherworld. It's just that Fami is the only one who would talk about it. It's a place of perpetual fog and darkness, one that can embody your fears with the monsters in it. It's very rugged and grim there.

The Death Devil takes on the appearance of a young woman who wears a high school uniform and a black cap from the Devil Hunter Club. She has grayish-mountbatten pink-colored neck-length hair and has several moles on her face. Similar to the other Horsemen, she has piercing, multiple-ringed eyes. On her colored manga cover, her eyes are shown to be pink. Her ears feature four green earrings, two of which are beads on her right and the other two are unusually long and have a triangular shape at the end.

When her true identity is exposed, the Death Devil is shown to have a large, vertical incision running down the center of her torso and abdomen. This is the result of her failed attempt to end her own life by removing all of her vital organs, leaving her as a hollow corpse that continues to exist despite having an "empty" body.