Shiro is the main character and the character we follow throughout  the story. Shiro is in class 1-A and comes off as the "quiet and smart" character, but in reality, she's quiet because she doesn't like anyone, she speaks with slang terms, can be loud and obnoxious, is easily annoyed and aggravated, very hard to please, and very defensive about specific topics. Her voice shouldn't be too high, I'd say not to high, but also not too low as well.