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In times of olde, humans live in constant fear of demons known as yoma. These vicious creatures can take the appearance and memories of humans they have devoured, thus blending into society as they freely feast on human flesh. The key to stopping the yoma lies with the tolerated yet feared Claymores - women who are half-demon, half-human, and fully fated to become the demons that they hunt. Meanwhile, in a village, the young Raki has been banished; his only crime was losing his family to the yoma. Raki is drawn to a Claymore named Clare, and together their journey begins. While Clare fights the yoma plaguing the land, can Raki help her in her struggle to retain her humanity?
Both main characters are similar (Clare and Sven) as they became soldiers since childhood and went through inspiration and tragic pasts (the deaths of their parents) in different ways (Clare-Teresa and Sven-Science) and are part of the organization whose goal is to extinct races (Organization with Half Human Half Yoma against Yomas/Awakened Beings and Earth Alliance/BlueCosmos/Logos/Phantom Pain with Naturals and Extended/Biological CPUs against Plant/Zaft/Coordinators) and both would later betray them at the end. Sometime during the story, they form bonds with other beings (Clare-Raki and Sven-Selene) whom will change them forever. Both shows contain dark, suspense, seriousness, gore, and sword fighting. The only difference is that in Claymore, it involves demons, powers, and ancient weapons whereas Gundam Seed CE 73 Stargazer involves Mechas, space, ships, guns, and other mecha melee weapons and with no powers.