"Mutants generally tend to be." It's a shame Kanaya doesn't actually understand in the slightest Gokudera's status as a "half-breed", or else she could draw that comparison. (And probably remark t herself that of course there's some terrible secret to Gokudera's genetics, as if she needed anything else to assure her of his serendipitious status as a substitute for her darling stuck-at-home leader.) "It's understandable, considering the fear they have of being culled." She takes quite a few delicate bites of her hamburger before it occurs to her to set it down and ask thoughtfully, "Is culling a thing for humans?"