She calls himself A.
Ayin is the founder of Lobotomy Corporation and coworker of Carmen and the Sephirah.
Ayin has black long hair, yellow eyes, wears an almost completely black attire with a shirt, belt, pants, and shoes, with her lab coat over the top. The letter 'A' is just the shortened version of her actual name.
She was a scientist, but she is currently the manager of Lobotomy Corporation.
She hates Angela so much, even though she is the one who made Angela. Ayin has pure despise of him.