Here is her character description, via IzanagiGames:
Izane (voiced by Akari Kito) works for Yurukill, Inc. as Gentoku’s chaperone. She is mysterious and doesn’t leave much of an impression, and it’s difficult to tell how old she is. You could say she was in her teens or in her thirties and no-one would bat an eyelid. She is extremely timid, and prone to bouts of sobbing. Yet she sometimes makes sly remarks to her teammate, Gentoku.
Watch the trailer below.