The Dark Lord is Hydra's pet cat. He has black fur and yellow eyes. No pictures of him exist, as every attempt to take one comes out unexposed apart from his yellow eyes. During the 8th anniversary stream (2025/4/12), Hydro read a text from Hydra asking him to feed The Dark Lord from a “writhing bag in the fridge.”
Hydro is sometimes confused or unsettled by The Dark Lord and calls him only “Dark Lord.”