Karen is strongly admired for being a calm, stoic, mature young woman, despite covering up her insecurities and feelings of loneliness. She dearly misses her parents as they are usually away, but out of obligation and feeling that everything rests on her shoulders she refuses to let it get to her, she’s come to think she needs to do everything by herself. She was originally very enthusiastic about being class representative prior to meeting Komachi, but by the time it began wearing her down she was forced to keep going to be there for her. While usually calm in temperament, when pushed enough she can sometimes get to a point where she ends up saying hurtful or offensive things to other people. A mature-sounding voice would suit her best. (Voice example: https://m.youtube.com/watch?v=PaK09j7leJQ&pp=ygUJQ3VyZSBhcXVh)