The Briarknit Kami is not the first to use thorns for the defense of herself and hers. She knits coats of thorns into the flesh and bark of her companions to protect them. A coat of thorns, if worn the right way out, is a proper defense. Thorns woven, grown, and knit into and out of your own flesh by the Kami's clever hands are perhaps creepier, but every bit as effective and very much more the green kami's organic style.
One thorn to warn, ten thorns to defend, a hundred thorns to destroy.