Talk:Chara/@comment-26567605-20160421040538/@comment-4859287-20160513235614

The short explanation of Chara being evil is that there is proof alluding to this on both Genocide (Merciless) and True Pacifist (Merciful) runs. Chara, having taken over your body through a merging of souls sharing the same property, kills off the entirety of monsterkind, and then at the end, consciously reveals itself to you. At the end, when you choose NOT to destroy the world... He laughs at you and says "you were never in control." This is the ending for Genocide. At the ending of True Pacifist, Asriel, as he reveals your name not to be (Chara), but Frisk, also says that "Chara hated humanity. He wasn't the nicest of people. Not like you, Frisk." Regardless of whether or not you wanted to kill all of the monsters in the underground or not, it's completely canon that you have no control over it in-game. You don't corrupt Chara - your desires simply synchonize with theirs, allowing them into your sould to merge.