Helluva Boss

 is an adult animated musical Horror Comedy web series created by Vivienne Medrano, and is set in the same universe as Hazbin Hotel. It features the voice talents of Brandon Rogers, Richard Steven Horvitz, Erica Lindbeck, and Brock Baker.

The story follows Blitzo (the "o" is silent); an eager imp hitman who owns a startup assassination company in Hell, which specializes in traveling to Earth to kill living humans on behalf of damned souls, as revenge for (real or perceived) wrongs when they were alive. Along with Blitzo's weapons specialist Moxxie, his bruiser Millie, and his receptionist Loona the hellhound, he attempts to manage his business by himself amongst the competitive market of Hell. Together, they all attempt to survive each other as they try to keep their company afloat.

The show's pilot episode was released in November 25th, 2019, and its first season officially premiered on October 31, 2020. The whole series can be found on the creator's YouTube channel.

Tropes in Helluva Boss

 * Cast Full of Gay: Among the four main characters that comprise I.M.P., Blitzo is apparently pansexual based on a post on his Instagram, and Moxxie is confirmed to be bisexual in a tweet for Celebrate Bisexuality Day 2020. Outside of I.M.P., there's Stolas who, while his sexuality has yet to be clarified, is completely head over heels in love with Blitzo specifically and can't put to words why can't find happiness in his marriage with his wife based on a number of posts on his Instagram and in the episode "Loo Loo Land". The episode "Spring Broken" also shows Loona acting as a Honey Trap to both men and women, and the crowd that gets enchanted by a succubus song includes multiple same-sex couples. In "The Harvest Moon Festival", Millie's sister Sallie May has male imp horns, white (male) hair showing at her roots, and was confirmed by their voice actress as transgender.
 * Circle of Hell: While Word of God already stated, and Stolas' song in Episode 2 mentioned, that the Hell of his story and Hazbin Hotel was divided into 7 circles corresponding to the Seven Deadly Sins, Episode 3 fully confirms that said Hell is genuinely structed in vertical layers that can be traversed by hellborn demons.
 * City of the Damned: From what little is shown of Imp City, it is implied to be just as much of a Urban Hellscape as Pentagram City.
 * Couch Gag: Starting from "Murder Family", the content warning as the beginning of each episode slightly changes every time. The warning goes "The following cartoon contains (flashing or bright) lights, naughty language, (insert horny species here), and is intended for mature audiences." The "horny" part is the main difference:
 * Episode one is simply "horny humans and horny demons".
 * Episode two is "sad horny demons".
 * Episode three is "honey demons and very horny humans".
 * Episode four goes back to "horny humans and horny demons".
 * Even Evil Has Standards
 * Flashback: About half the pilot consists of flashback sequences as I.M.P. discuss their problems at a staff meeting.
 * Fun with Acronyms: The assisination business run primarily by imps is called I.M.P. (Immediate Murder Professionals).
 * Larynx Dissonance: The female nurse at the hospital they take the kid is voiced by Brock Baker, who makes absolutely no attempt at actually sounding like a woman.
 * Pet the Dog: If you look closely, Loona is visibly touched when Blitzo refers to her as family and how you don't get rid of family.
 * Vocal Dissonance: The girly-looking nurse in the hospital speaks with a very deep, manly voice.