Ada was a smart little demon girl and Khufu's little sister. She originates from the Ashigori clan, but followed Khufu to Traitor City. Given her origins she is almost certainly a pureblood demon.
While just about all demons have teeth that make people think of sharks or other unpleasanties, Ada stands out by having fangs that are a bit extra crooked, making them peek out a bit.
Ada means witness