Mable Macintosh

Mable Macintosh (マーブル・マッキントッシュ) is a staff member aboard Seraphix, a division of the Chaldea Security Organization

Background
Mable was familiar with Kiara Sessyoin after her arrival as Seraphix's therapist.

During the incident where Beast III/R takes over, she eventually died.

Role
All of Mable's actual appearances during the story are Kiara taking her form.

After the defeat of Kiara, BB makes the event an imaginary numbers phenomenon, so it is if "nothing had happened" and all staff besides Kiara are saved.