Teresa, the renowned Claymore known for effortlessly defeating enemies with a faint smile on her face, is widely considered one of the strongest and most powerful members of her generation. Her exceptional speed, strength, agility, and unparalleled ability to sense Yoma aura set her apart from others. While she may appear weaker than those below her due to her reserved nature, Teresa's true power lies in her ability to predict her opponents' moves with remarkable accuracy. Despite facing an awakened former number one, Rosemary, Teresa has never utilized more than ten percent of her full potential, which is sufficient only to change the color of her eyes. Prior to becoming a Claymore, Teresa was often referred to as a "problem child" by her trainers due to her unconventional behavior during her training. Initially indifferent towards those she assists, Teresa eventually develops a fondness for Clare after the latter decides to follow her following being abandoned by their village. Though initially irritated, Teresa soon grows to appreciate Clare's company and support.