"All they wanted is to wipe out evil from the Universe. But they blamed the Keyblade wielders for this mess."
The Helvans are an advanced technology race of human/cyborg bent on conquering the universe so that darkness will be terminated, including the Keyblade wielders.
The Helvan Empire are not considered villains by most; they just want to erradicate all Darkness in the universe, so that there will be peace forever. The Helvan Empire blamed the Keyblade and its wielders for creating Darkness for reasons even they don't know. The Helvan Empire is the main antagonist of the upcoming story Knigdom Hearts: The End is Near.