Yandere-chan from Yandere Simulator
It's a fanart I made for the game. .. I like bloody crazy girl (from afar and as the third person.. )
bakki.deviantart.com/gallery/4…

the game logo courtesy by the dev.

it's a game about... yandere girl. (No official name for her yet)
it's like an overly attached girl that will kill anyone that stand in her way to you, including you sometime.
tvtropes.org/pmwiki/pmwiki.php…

It's a real game in development, you can download the game and read more here.
yanderesimulator.com/ 
and the youtube channel below
www.youtube.com/yanderedev

other vesion
Yanyan version by bakki deredere version by bakki