As with the previous dubs, I want to recreate Blanc as closely to the original voice actress as possible. As the VA, you'll need to be able to portray a variety of emotions in character, interpret and mimic tone based on the original Japanese clip, and have a decent understanding of the character in general.

Blanc generally speaks quite softly, but is short tempered, and speaks much more aggressively when angry. It's important to be able to match all emotions for the character accurately.

https://www.youtube.com/watch?v=vKlAl2c8haw This is probably the best reference I can find. It's a collection of VR events from the newest mainline game.
EDIT:
https://drive.google.com/file/d/1eiF9FASbR2jxUc71RRAXBuOCXxeumjY1/view This is a collection of clips from the anime, which shows Blanc's voice more accurately.