You may say 'oni no tora,' written: 鬼のトラ
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.
13-Bi tora oni
"Ki" means spirit and "tora"means tiger Kitora because in the Japanese language you say spirit first than tiger.
youkai, onii, bake-mono
Akuma no Tousen :D