"Mother" Noctis is a High Nun who works under the Father of the monestary known as Father Adriel

Noctis is a excorcist along the many other priests like Vanitas who actively don't tend to go well together Vanitas is too stubborn and strict while Noctis seems to be more patient in certain things.

Her way of dealing with the possesed can be very foreign and downright unnusual further explanation is not fully known yet since she goes solor but let's her work case is heavy and practical with 'monestary toys'.

Her face is covered in a dark shadow or sometype of head covering maybe? Not sure yet more info on that soon.