Alicia was Claymore No. 1 of both Clare's and Clarice's generation.

Her identical twin sister, Beth, was No. 2. Alicia was a new type of Claymore, and wore a special black uniform, earning her the nickname "Alicia the Black"She and Beth together were known as "The Black Ones," and were the first successful attempt at a controlled Awakened Being via "Soul Link." According to her handlers, she was The Organization's most pride worthy and powerful product. Rubel later claimed that Alicia would be the strongest claymore in history since she and her twin had undergone training at a very young age with the sole purpose of being used to combat the Abyssal Ones. Like Beth, Alicia wore a black version of the Claymore uniform. Alicia appears emotionless and is completely obedient to the Organization. She rarely speaks and only does so to inform. According to Rubel, the Twins have "no sense of self", therefore lacking in individual personalities and independent thought. The reason for Alicia and Beth's lack of character was to ensure a successful Soul Link.

However, this statement proves to be an exaggeration; despite not being outwardly affectionate, Alicia does show concern for Beth and seems to feel that her twin's safety is of greater importance than the success of their missions. She is very loyal to humans