Board Thread:Speculation House/@comment-72.233.169.11-20160215142931/@comment-25209034-20160215162820

Grimmstride wrote: LiveandSound wrote: But they have reasons for it. No one wants to burn the world just for the heck of it. Especially in fiction, since that would be very stupid.

The only cases where such a thing is acceptable is if the villain has The Joker's level of insanity, which so far no one in RWBY has. She's lost hope in humanity perhaps. There are a lot of possibilities to bring someone to hate mankind. Maybe she was always like that and isn't human and just wants to destroy mankind. Like stated in the show Grimm grow smarter as nthey age so she could just be the oldest Grimm.