The hit animated series Hazbin Hotel and Helluva Boss both exist within Vivziepop’s Hellaverse, and beyond their similar vibe and shared cast members, the two shows also have many canonical overlaps. Despite their similarities, the connection between these series can get quite complicated. After all, the Hellaverse worldbuilding is often not explicitly explained within the two shows. Much about the lore has been established behind-the-scenes or inferred based on various details sprinkled throughout Hazbin Hotel and and Helluva Boss’ first seasons.

https://screenrant.com/hazbin-hotel-helluva-boss-vivziepop-hellaverse-explained/