Seren

Ok. What is the character name?

I don't even know it, the character remind me of Azula with nice smile.

Her name is Li Chang Ge.
From this manga, unfortunately it had licencing issues and will likely never be completed, but hot damn its good.

http://mangafox.la/manga/chang_ge_xing/v02/c005/13.html

Yeah its from this manga: http://mangafox.la/manga/chang_ge_xing/v02/c005/13.html
and as you can see it's just a threat haha
My holy grail of manga; storyline, characters, art, got it all.

Yeah, I can already tell I'd really like the MC (assuming that's her). Sadly, it doesn't look like it's being translated.