Angela is a highly advanced Artificial Intelligence taking the form of a blue-haired, pale-skinned man; his yellow eyes are rarely seen open, except for when he is angry. 
Angela is 170cm tall male AI.

His roles include the surveillance of the entire facility (and thus creating an alert when an abnormality breaches or an employee dies), giving X (the manager) advice on how to interact with abnormalities and handle breaches, acting as the manager of the Sephirot and other unspecified tasks.