Pretty minor umbral creatures, not all that threatening on their own. So far they appear briefly in S1 Ep2 and S1 Ep5.

Man I love creature design. I mean Umbra was literally created as an excuse for me to fill this post-apocalyptic world to the brim with unique beasties! I am obsessed with SCPs and taking inspiration from mythology so I kind of combined the two concepts and yeah... Hope you like the designs as much as I do!

"In a post-apocalyptic world where portals invite the supernatural, a mischievous high school student attempts to live a moderately normal life after becoming the first human-wulver hybrid. A werewolf."

If you're interested in reading it here ya go. ---> https://www.deviantart.com/littledevil-888/art/Wolf-Of-Penumbra-S1-Ep1-literature-802918761