Nichirin, oni form, breathing, and outfits of Amime are all included in the Craft Slayer addon for Minecraft Bedrock. This is a very entertaining and engaging add-on in multiplayer.
Creator: BeryReby
Craft Slayer Addon
Oni form:

Nichirin
Nichirin Sword Flame



Nichirin Sword Black


Nichirin Sword Moon


KyokokuKamusari



Nichirin Sword (Tomioka)

Nichirin Sword Kanroji


Nichirin Sword wind

Nichirin Sword water


Mark Actived

Mask

Some Demons Slayer Addon you can check in Mcpe Addons:

Download Craft Slayer Addon (BP) or Link Backup
Download Craft Slayer Addon (RP) or Link Backup
How are you able to get the swords in survival
yesOk