Both are Epic Adventures that are about two sibings that go on a journey after there family members died, on this journey the older sibing is looking for a way to turn his younger sibing back to normal, this Journey is also not easy because the sibings must fight many strong many strong monsters.
-Both include protagonists that are motivated by the goal of saving a sibling that they care deeply for.
-The main antagonist is one that is not known to the public eye.
-There are lighthearted moments of affection shown in occasional scenes of both fmab and kny.
-The siblings in both anime have great disabilities, but they are not helpless at all. They make up for their disadvantages in other ways like brute strength or toughness.
-The protagonists have survived tragic backstories.
-In both fmab and kny, the protagonists are sent to different locations on their journey to save their siblings, giving the shows a nice, adventurous feel.
-Both see the protagonist losing their family early in the story
-Both protagonists aim to heal their sibling from the traumatic transformation they undergo, and have them traveling all around the world to find a cure
-Both involve the protagonist joining some sort of organization to further this goal
-Both have similar comedic attributes
Both helps his brother or his sister back to human.
Tanjiro helps his sister Nezuko demon back to human and Edward Elric helps his brother Alphonse to bring his body back.
When you watch either, then you are likely drawn in by the very concept of the main character's drive. To right the wrong done to their family as they explore an intriguing world with concepts you will come to understand. Both series ends up challenging these stalwart characters on their quest to find the solution to a seemingly hopeless situation.
Fullmetal Alchemist: Brotherhood takes a more loose approach, giving these characters time to explore this world and try to understand exactly what it is they are trying to find: the philosopher stone.
Demon Slayer takes a more methodical approach giving the solution very clearly, but a most
Both series have an older brother, who goes to hell and back to save their younger sibling turn back to a human. They also have a strong focus on character and share a similar tone.
Both series follow 2 siblings after tragedy strikes, struggling to reassemble their lives. They both have a darker somewhat realistic tone to your typical shounen with fairly intelligent likable leads.
One thing I find quite striking are these little moments of empathy the protagonists shares with their enemies due to their similarities with the protagonist's sibling.
In both series, the elder brother works for a government like organization. As a result, they must travel all over the country as they look for the cure to return their siblings to how they once were.
Both stories are centered on two brothers. The goals of both animes aim at the recovery of the younger brothers, in the FMAB the body of Alphonse and in Demon Slayer the humanity of Nezuko.
There are incredible battles and powerful villains, as well as a lot of blood in the fights. In both anime, the villain who creates all the opponents found during the anime.
Stories of two siblings finding a way to get their human bodies back
Both of the Main Characters embark on a journey to seek answer's how to turn their siblings into human again. Both anime are fun to watch!
Both having funny moment before and after fighting
both anime have the same story,to make mc brother(fma) sibling(kny)
return back to human.
Both anime using elements to attack like wind,fire,water. The Differences are fma using some pole to create magic while kny only needs a sword
take fma if you want story,take kny if you want graphics :D