Rafaela

Rafaela was Claymore #2 in Luciela's time and Claymore #5 in Clare's time. She is first seen as Irene's pursuer. Her power is considered equal to that of her elder sister, former Number 1 ; Luciela.

Luciela's Time
Rafaela was a part of the Organization's first experiment using a soul link to control an Awakened Being. The experiment fails causing her elder sister, Luciela, to lose control and fully awaken. Rafaela lost an eye, which she intentionally did not regenerate. She's blamed for the experiment backfiring, because of her 'weak heart'. Consequentially, she was stripped of her number and stayed inactive as a Claymore. She appears to have been one of the longest lived Claymore so far (disregarding awakened warriors), as she was around from before Luciela's time when she met Teresa, who was still a young warrior in training.

Clare's Time
After the organization loses the five highest ranked Claymores in the Teresa incident, the Organization invited Rafaela back in exchange for information regarding her elder sister. Rafaela accepted the offer because she feels there is a last thing she has to do, which is to find her sister, who she believes she failed. She finally tracked down her elder sister in Volume 12. Rafaela kills Luciela, who was weak from battling Isley, by breaking her back. She appears to be extremely upset.

Afterwards
In the new arc, Audrey (#3) told Clare that she heard Rafaela died. If she were in fact alive her aura would be untraceable by now, same as Galatea. In chapter 82, Riful reveals to the recently captured Renee that she had found Rafaela and Luciela soon after Luciela died. She also tells Renee that Rafaela felt responsible for Luciela's awakening. So, Rafaela killed awakened Luciela to fulfill her duty as a soul link and a sister. In the process, Rafaela unconsciously injected all her life force into Luciela's dead body. This deed killed Rafaela but fulfilled her loyalty to Luciela. After Rafaela merged with Luciela's body, both of them entered a vegetative state. Riful plans to use Renee's yoki manipulation to make them awaken.