"Frightfur" monsters are based off of corrupted versions of animals from "Fluffal" archetype. They feature a destroyed toy with scissors and a being with two red, glowing eyes residing inside them, giving them a more demonic appearance, in contrast to the "Fluffal" monsters.
"Frightfur" is a pun of "frightful" and "fur". Their Japanese name, "Des-Toy", can be a pun on "destroy". It can also be translated as "Death-Toy", describing their menacing appearances.