Julia is a serious no nonsense young lady. She seems to know exactly what she's doing and her voice carries over a calm, somewhat emotionless at times. She makes minor appearances in the first episode but plays a major role in the later episodes.

Her voice tends to be smooth and almost ... mysterious? That being said, you can catch her offguard at times and completely break her cool either by making her very angry ... or making her laugh hard.

 Please see the two references below.

Possible References: 

Please note that while we're posting references here, since these are original character, they're only an example of possible voices. Please provide us with your auditions and takes of the character even if you don't match the references.

Lust from Fullmetal Alchemist: https://www.youtube.com/watch?v=_qjkwovZweI

Makoto from Persona 5: https://youtu.be/400o53Xt_U4?t=2m12s