Black Alice/Goddess of Chaos

The Black Alice of the original world and the Goddess of Chaos. Though she was killed at the end of first Monster Girl Quest trilogy,

Biography
Black Alice appears after the events in the original world, when Luka and Alice defeated her in Heaven and her infused with the White Rabbit drug and devoured Ilias for her powers was sent back 30 years in the past in Remina, then following the death of Ilias by the hands of Luka and her friends, scientist from Remina originally intend to summon the spirit of Heirich using his sword though they were not aware that sword was stained with Black Alice's blood accidentally summoned her. As a result, she was given an opportunity to attain the power of chaos, that which existed before light and darkness, and from which light and darkness (and therefore Ilias and Alice I) originated. Because of this, Black Alice was able to become the third goddess, possessing powers that surpass the former two goddesses. She caused the Great Disaster which in turn created the chaos that is devouring all of the parallel worlds, and is thus the main driver behind the conflict of Monster Girl Quest: Paradox.

Trivia
She only appeared in a flashback at the end of Part 2.