Board Thread:Questions and Answers/@comment-29680061-20170613161817/@comment-26369723-20170620184417

That depends on Frisk being evil or not, in the end of the Genocide route, Chara is influenced by Frisk actions, but clearly stepped up as a villain by double-crossing Frisk and presumably destroying the game/ world, creating a void which the only survivors are Frisk and Chara, so definetly: Chara Dremurr is a villain.