Teresa is the claymore No. 1 of her generation, she is among the eight No. 1 warriors capable of surpassing the original Abyssal Ones. She is considered by Miria and many other Claymores as the strongest No. 1 of all time. She is also regarded as the most powerful claymore that every existed for her unparalleled combat ability, Yoki sensing, and Yoki reserve, as even against an awakened Rosemary or a near-awakened Priscilla, a mere ten-percent energy release was enough for her to overpower them.