You say it like Kitsune akuma which is spelled like キツネ悪魔 but im candadian and i asked my japanesse friend
demon blade in Japanese is akuma no tsubasa
ma o
ダークデーモン
There are manyways for example a kitsune is a fox demon, however the most common one reffering to demons in geral is youkai. In Japanese the words cat demon is Neko youkai.
'Beautiful demon' would translate to 美しい鬼 (utsukushii oni) in Japanese.
ma o
Hi no akuma
Furasshu no akuma
aoi akuma
probaly Kyuubi reference from naruto newtest3
youkai, onii, bake-mono
Akuma no Tousen :D