Smallest bat alive. The bugs in hk are a bit big for bugs too. DOESNT THAT LOOK LIKE GIM TOOO??? Okay this is hilarious its name is the Kuhn Kitty bat. I think of Grimm as a kitty a lot, so funny coincidence. This one is pretty big compared to the other kitty bats. Its about the size of a bumblebee (hence one of its nicknames, the bumblebee bat) , and is known to be the smallest mammal in the world.
Also, since I believe the shade lord to be a tarantula or wolf spider, and radiance a bigger moth of sorts, this fits PERFECTLY. Google for the image.