Aki Hayakawa Vs Roy Mustang

#### (Chainsaw Man Vs Fullmetal Alchemist)

* Both are highly-regarded members of the government organization that governs their settings (Public Safety Devil Hunters and Amestrian Government). Both have occupations within this setting that relate back to the fundamental premise of the story (Devil Hunter and State Alchemist).
* Both suffered an immensely traumatizing causality event in their youth (Roy with the Ishval war and Aki watching his family be killed by the Gun Devil), the consequences of which would serve to foster the iron-clad ambitions that drives both's motivation to correct the injustices they oversaw (Roy seeking to become Führer and reform Amestris to the point where he could prosecute himself for the War Crimes he committed and Aki wishing to avenge his family by killing the Gun Devil). This motivation is the reason for both's continued perseverance within their occupation.
* Both have a deeply influencing friendship with one of their workmates (Himeno and Maes Hughes), who dies early on in the story as a result of the actions of a sharp-tongued, inhuman antagonist who has dueling forms of both human and inhuman features and a name that bluntly links them to a specific set of concepts (Envy, who is one of the Homunculi linked to the Seven Deadly Sins, and Katana Man, who is one of the Devils linked to the concept of weapons. Both of these, Both of their conceptual bindings are a result of their intrinsic physiology, with Envy being born from Fathers own Envy of Humans and Katana Man being linked with his title due to the way Devils function in CSM)
* The death of these people leaves has a profound impact upon the both of them, with both deceased frequently being shown to occupy their thoughts. Both also gratuitously brutalize this character when they reach direct confrontation with them (Roy burning Envy's eyes out of their sockets, Aki repeatedly sack tapping Katana Man)
* Both also keep the company of their outwardly reserved work partner (Riza Hawkeye and Angel Devil), whom was left mentally scared as a result of the memories of their own involvement in a mass casualty event.
* Both were orphaned at a young age.
* Both are noted for masking their true morality and capacity for love under an outwardly impassive persona (Roy's act as a lazy, arrogant flirt covering up his immense devotion to his allies and Aki amplifying his cold, mature persona to cover up his grief and desire for companionship)
* Both are, at first, antagonistic towards the newly recruited protagonist, a boisterous blond boy who gained enhanced abilities after a near-death situation brought them in proximity with a mythical figure (Edward, who gained enhanced alchemy due to observing Truth, and Denji, who gained Devil Hybridity due to merging with Pochita). However, they quickly develop a fast bond and begin acting as the chief organizational ally to both the protagonist and his partner, who has questionably human physiology, an existence bound by blood and an affinity for cats (Alphonse Elric and Power). They also aid in the effort to protect the protagonist from the targeted attacks of an antagonistic figure with, foreign loyalties, mental trauma relating to the military and immense destructive power gifted to them via way of a physically implanted power source (Reze and Scar)
* During the story, both move from their original stationed government unit to a location-tethered one containing many of their closest allies (Mustang Unit in Central and Tokyo Special Division 4)
* Both have the goal of eliminating the inhuman creatures that occupy their world (Devils and Homunculi). Some of these creatures exist as a result of their implantation within humans (Human-Based Homunculi and Human/Devil Hybrids), and all are connected with a set of conceptual ties (The Homunculi being based upon the Seven Deadly Sins and CSM Devils having conceptual titles that define their being). Both also relate back to negative elements of humans (Homunculi having been born from the Seven Deadly Sins and Devils growing stronger when a human fears its title)
* Both eventually learn that the organization they have been working for is compromised from the top down, specifically due to the control of the ultra powerful leader who has ties to the role of "President" and is one of the human-like creatures they seek to destroy (Makima, who is capable of regenerating thanks to her contract with the President of Japan and King Bradley, the crux of whose entire existence was to rule over humans as Furhrer President)
* Both have a passive ally-ship with an older government character who ranks as their superior, and also secretly seeks to overthrow the inhuman creatures that have infiltrated the government (Lieutenant General Grumman and Captain Kishibe). This character ends up following them to their new post and plays a surprisingly significant role in the aftermath of the story.
* Both are noted for their extremely adept vision for the future (Roy due to his aspirations for reforming Amestris and Aki due to his contract with the Future Devil giving him Future Sight.)
* Both end up battling against an army of zombie soldiers who's namesake are reminiscent of purchasable replicas of the human form (Santa Claus Doll army and the Amestris Government's Mannequin Soldiers)
* Both end up being utilized as a living conduit for the villians plans, which involves them taking an pre-established role of which there are multiple in control of the antagonists (Human Sacrifice and Hybrid Devil). The events of this action creates a specifically tailored punishment for both that mares their distinct vision and mocks their main goals (Roy losing his sight, ironically robbing him of his "vision" for the ambitious future of the country, and Aki having his eyes transplanted with the Gun Devil, becoming the very thing he vowed vengeance upon). This severing of vision is initiated by one of the human-passing creatures whose true nature is not rooted in humanity (Pride and Makima) and completed by leaving both Roy and Aki to the control of a mythical, powerful being within the setting (Truth and the Gun Devil)
* Both have abilities that function upon an established exchange of unbreakable universality (Aki's contracts with his Devils and Roy's alchemy running on the universal system of Equivalent Exchange). This exchange can even be seen in the specifics of their attacks (Aki trading part of his body for the aid of the Fox Devil and his lifespan for the aid of the Curse Devil and Roy converting oxygen into Flame with the aid of his transmutation circle gloves). These powers are usable thanks to an existing connection between them and a point of power (Again, Aki's connection to Devils by way of contract and Roy's connection to his Gate of Truth)
* Both have proven willing to sacrifice their own physical well-being to use their abilities in combat (Aki sacrificing both parts of his body for the Fox Devil and his lifespan for the Curse Devil, and Roy carving a transmutation circle into his hand to cast without the need of his gloves)
* Both have a pair of differing exchange points that offer them two different methods of attack. One, a large, frenzied AOE blast (Roy's right glove and Aki's Fox Devil contract) and the other a more initially reserved attack that can lead to immense damage but requires more finesse to properly hit (Roy's left glove and Aki's Curse Devil contract, which requires him to stab the opponent three times before activating)