blood and breathing
While Kokushibo uses Moon Breathing, his human name was Michikatsu Tsugikuni. This was the specific Breathing Style he used before failing to learn Sun Breathing and turning into a demon.
Wind Breathing.
to defeat Muzan, Tamayo and Shinobu engineered a 4-stage drug. The first stage turned him human, the second aged him, and the third prevented division. This was the final, devastating fourth stage.
Cellular Destruction (or destroying the cells weakened by the first three stages).
Aside from Tanjiro, this specific core Demon Slayer corps member does not use a traditional Nichirin Blade, opting instead for a repeating shotgun loaded with special pellets
Genya Shinazugawa
Hantengu’s (Upper Moon 4) ultimate form is Zohakuten (Hatred). Name the four emotional clones that must fuse together to create him
Sekido (Anger), Karaku (Pleasure), Aizetsu (Sorrow), and Urogi (Joy)
Stone Hashira Gyomei Himejima uses a devastating spiked flail and axe connected by a chain. Unlike traditional blades, his weapon is forged with a unique alloy that has absorbed so much sunlight it can do this—a feat no other blade can do without a slayer's physical help
Turn bright red on its own (by clashing the chain and weapon pieces together, thanks to the sheer purity of the sunlight-soaked iron)
When Akaza uses his Destructive Death: Compass Needle technique, his attack accuracy and power scale based on this specific trait of his opponent.
Battle Spirit (Fighting Spirit / Touki).
Kagaya Ubuyashiki used himself, his wife Amane, and these two specific daughters as bait to lure Muzan into a massive explosive trap at his estate
Hinaki and Nichika.
Mitsuri Kanroji's whip-like Nichirin sword is incredibly thin and flexible. To prevent her from accidentally cutting herself, it was custom-made by this specific village chief
Tecchin Tecchikawahara
Doma, Upper Moon 2, uses a Blood Demon Art that creates lethal ice particles. If inhaled, these particles specifically target and destroy this organ of a Demon Slayer, making breathing techniques impossible
The Lungs.
Insect Hashira Shinobu Kocho cannot physically decapitate a demon due to her weak grip strength. Instead, she mixes lethal Wisteria poisons inside her scabbard. This is the specific medical/chemical method she uses to rapidly change the poison formulas mid-battle so demons can't build an immunity
Clicking/engaging a custom mechanical trigger inside her sheath (which mixes a new poison recipe every time she re-sheathes the sword)
To activate the Demon Slayer Mark, a slayer's heart rate must exceed this many beats per minute, and their body temperature must reach this specific degree in Celsius.
200 BPM (beats per minute) and 39°C.
This is the name of the rare, blue flower Muzan spent a millennium searching for, unaware that it only blooms during the daytime.
The Blue Spider Lily.
Hotaru Haganezuka goes into a trance-like state while polishing a 300-year-old sword found inside this mechanical doll, which was modeled after Yoriichi Tsugikuni
Yoriichi Type Zero (Yoriichi Zeroshiki)
Gyokko (Upper Moon 5) claims his true, un-bottled form is completely unassailable because his body is covered in scales harder than diamond, which are made of this material.
Flexibly Soft Pearl.
Serpent Hashira Obanai Iguro belongs to a clan that worshipped a female snake demon. Because his clan sacrificed their own infants to her, Obanai was kept alive only because the demon took a liking to his eyes. This is the tragic reason his mouth was slashed open by his own family when he was twelve.
To make his mouth match the snake demon's mouth (so she could drink his blood until he was big enough to eat)
Kaigaku, the Upper Moon 6 replacement, utilizes a unique Blood Demon Art that fuses his Thunder Breathing with this element, causing the flesh of his victims to crack and burn continuously.
Electrokinesis / Black Lightning.
The Final Selection takes place on Mt. Fujikasane, where demons are trapped by Wisteria blooming out of season. This is the exact number of days an examinee must survive to pass.
Seven Days
When a Nichirin blade turns bright red, it significantly slows down a demon's regeneration. Slayers can achieve this solo by gripping their sword with immense physical force, or by doing this action with another slayer.
Clashing or striking their swords together
Muzan Kibutsuji’s anatomy is a medical nightmare. To prevent simple decapitation from killing him, his body contains this exact internal configuration of multiple hearts and brains
7 hearts and 5 brains.
Wind Hashira Sanemi Shinazugawa possesses an incredibly rare blood type known as Marechi. While regular Marechi blood is a delicacy to demons, Sanemi’s blood is so concentrated that it has this specific physical effect on any demon who smells it
Intoxication / making them act drunk (it severely impairs their senses and coordination).
This is the specific number of forms in Thunder Breathing that Zenitsu Agatsuma actually mastered before creating his own Seventh Form.
One (He only ever mastered the First Form: Thunderclap and Flash).
Muzan Kibutsuji became the first demon during this specific historical Japanese era, which is also the era the Ubuyashiki bloodline curse began.
The Heian Period.
This unique, heavy metal material—mined from the mountain closest to the sun—is melted down with Scarlet Ore to forge a Nichirin Sword
Scarlet Iron Sand
To kill the original Upper Moon 6 duo, Gyutaro and Daki, a slayer must accomplish this highly coordinated physical feat.
Decapitating both of them at the exact same time
Love Hashira Mitsuri Kanroji’s hair is famously pink and green. According to the official databooks, her hair changed to this color because she ate an absurd amount of this specific snack every day for eight months
Sakura Mochi.