So what are we supposed to do!? Once they take human form, It’s practically impossible for us to spot them! Are you saying we should just round up suspicious looking characters!?

Yes. Humans created them to fight against the monsters. They belong to an organization called Claymore. They earn a living killing Yoma for anyone who’ll pay a fee. They’re the only humans in the world capable of fighting the creatures.

What’s more, After a lot of testing, They’ve found that only females adapt successfully. They say every male who has tried it died a horrible death. Since Claymores are almost monsters themselves, They can spot disguised Yoma with their silver eyes. When Claymores are about to slay a Yoma, Their eyes shine gold, Just like the monsters. In any case, They’re called silver-eyed witches, or silver-eyed slayers.