So this confirms it's basically a split personality, but not really.
War Devil is murderous and is similar to Makima, in she doesn't see humans as anymore more than to use. Asa is caught between a rock and a hard place.
As a Villain sure, Mataka is much of a Villain.
As a character, it's heavily slanted because of chapter time. Not digging the LF BF thing.
She almost couldn't accept the reality but she's got to trudge through the mud to reclaim herself.