Clare (???, Kurea?) is the series' protagonist and an offensive type warrior. When she was a little girl, her family was killed and eaten by a yoma impersonating her brother. After being chased out of her village, another captured her and made her part of its disguise and its toy, often torturing her. The yoma was killed by Teresa and Clare, empathizing with Teresa's pain, followed her for days without rest, food, or water. Teresa, after at first trying to get rid of Clare, eventually let her travel with her, and the two became attached. The presence of a caring human in her life helped Teresa regain her lost happiness and humanity. Their life together was cut short when Teresa was forced to kill some human bandits to save Clare's life. The organization sent four of their best Claymores to execute Teresa, who was eventually killed by the awakened Priscilla.

In an extra scene we see Clare's days while she trained to be a warrior. Originally she was a very weak warrior who couldn't hold her claymore well and was picked on by a girl. However in the final exam to be a warrior she teams up with the girl to defeat a Yoma.

Clare, who mysteriously wasn't harmed, vowed to take Priscilla's head in revenge, and begged the organization to fuse herself with Teresa's flesh and blood. She thus became the only person to volunteer to join the Claymores and the first hybrid with 1/4 Yoma blood instead of the normal 1/2 and 1/2. Because of this low demonic ratio and power, she was given rank #47 - the lowest of all. However, Clare shares Teresa's ability of heightened Yoki sensing to the point of being able to predict an opponent's moves. It is unclear whether this is due to a biological inheritance, Clare choosing to follow in Teresa's footsteps, or a deliberately chosen tactic in order to fight Awakened Beings.

Clare partially awakened during her fight in the holy city of Rabona, but was able to revert to her human state with Raki's help. She lost her right arm during an incident involving Ophelia, but later received a new one from Ilena, along with the "Quick Sword" technique. However her "Quick Sword" only has half the speed and power of Ilena's.

She once again came close to awakening during her battle against Dauf, but Galatea manipulated her yoki flow and brought her back. She then was able to use the same method to save Jean from losing her mind to awakening.

In the Northern campaign, Clare joined Flora's party. Having grown significantly stronger she manages to fight on the same level as her captain. Compared to Flora's WIndcutter her Quick Sword is faster, but is less powerful and accurate. During the fight against Rigardo, Clare was able to deliberately awaken parts of her body, while remaining mentally human. However, she found herself unable to turn back after the fight. Jean sacrificed herself to save Clare. She's the only member of her team to survive the Northern Campaign.

Seven years after the last stand at the Northern Campaign while in seclusion with her 6 fellow Claymore survivors, she would master Flora's technique "Windcutter". She also trained herself to be able to fight without releasing any Yoki, making it exceptionally difficult for others to track her.

Currently, her old rank of #47 has been passed on to Clarice. She, along with all the other Claymores who survived the North Campaign, are considered deceased by the organization. Despite the danger of being discovered and hunted by the organization, Clare has returned to the southern lands to find Priscilla as well as continue her search for Raki.

This is changed in the Anime, however, where she confronts Priscilla immediately after her fight with Rigardo (a fight that ends before she awakens more than her legs). With the assistance of her friends and further awakening, she defeats Priscilla but is stopped from killing her by Raki. Jean sacrifices herself to save Clare from awakening. She and Raki continue to travel together.