ah yes the two shows in the same universe filled with characters who are dysfunctional as all getout, which makes sense as they are from hell. Let’s run down shall we Helluva Boss specifically since its’ the only one that has a show then just one pilot episode
Blitz: good god he has ALOT of issues most of which stem from his extreme levels of low self-estimate and habit of intentionally self-destructing his relationships because he always assumes he’ll destroy them at somepoint or they’ll leave him eventually so he goes on and does it ahead of time and for all case and purposes hates himself.
Stolas: a gay man was forced into a heterosexual marriage to an absolutely abusive bitch who more than likely raped him to get their daughter and constantly abuses him in various ways, with shown verbal abuse and implied physical abuse.
Moxxie: was raised in a mob boss family with an abusive dick of a father (which he shares with Blitz) who killed his mother when he was young.
Millie: not as bad as the former three but clearly as issues from being a “behind the scene” person for her husband and blitz
Loonia: was “raised” in a hellish orphanage that’s basically a prison until she was 17 when she was adopted by blitz and likely still has trust issues as a result along with the general much worse treatment hellhounds get in their version of hell.
And those are just the main characters, everyone that appears as extras are just as dysfunctional
as for Hazbin Hotel
first, Charlie is bi as she did had a boyfriend in the past and explicitly stated as such, and Alistair is asexual.