Character Summary: Karmen is the main character of Wake the Will. She is an 18-year old girl who logged into Wake the Will's VR game in order to eject the other users, ending their permanent retreat from reality. She believes people should not run away from their lives and to always push themselves to overcome their obstacles. 

Personality: Karmen has a somewhat cold personality on the surface, with a soft and caring layer mostly hidden within, especially for the story's secondary character, Evan. The intense feelings she has for Evan are what prevent her from going and ejecting Evan from the server at this time. She is headstrong and continues to push forward with her pursuits, always looking to make progress with her plans. She welcomes challenges and always looks to learn from her failures. She usually speaks more brief sentences with the other characters, reserving longer "speeches" for Evan when she tries to encourage him while facing an issue.

Voice: I envision Karmen having a feminine, calm, and confident voice. She'll primarily sound monotone, letting out a pinch of extra emotion in certain situations, primarily during card battles where she can act more dramatic. She should be soothing to listen to, probably could even pass for an ASMR. Picture a goth-like girl in her teens, or early 20s. I'll also provide links to some examples that I feel come closest to what I'm looking for: 

https://www.youtube.com/watch?v=Btrd21lpz2E Golden Darkness (Yami) from To Love Ru hits the tone and personality really well. Sadly dub clips were hard to find for Yami, so this seems to be the best I can provide. For Yami lines, skip to 1:23 for a longer stretch of Yami speaking. 0:09 - 0:14 for an additional line, or two. 

https://www.youtube.com/watch?v=eiFLrTWFuxA This is Maud from MLP's 2010s run. The tone is there, only Karmen wouldn't sound quite as uncaring when speaking by default. 

To reference Karmen, feel free to check the Webtoon: https://www.webtoons.com/en/canvas/wake-the-will/list?title_no=915818