Rainbow Caterpillar

"Things", aka Rainbow Caterpillars, are an unnamed species of worm-like critters which came from a Kyanite colony.

Biology
These creatures have a curious rainbow-colored body which are divided into several patterns, four forelimbs which lack fingers, expect an opposite thumb and a pair of toeless hindlimbs. They also possess two small antennae atop their head. They're able to squeeze through closed spaces such as doors.