another demon translation, whats the fascination with demons and why would you want to heal one
Akuma no yō na hīrā
hegurry
demon blade in Japanese is akuma no tsubasa
ma o
ダークデーモン
ma o
Hi no akuma
Furasshu no akuma
aoi akuma
'Beautiful demon' would translate to 美しい鬼 (utsukushii oni) in Japanese.
youkai, onii, bake-mono
Akuma no Tousen :D
鬼 /o ni/ is a good Japanese equivalent for what you are looking for.