I'm a bit biased because I have Deadly Sin characters I adore, but I kind of like when those characters don't entirely fit their Sin. Like, I don't think Asmodeus has to be a rapist or anything to be Lust. At least depending on the intention of them being Deadly Sins.
If they're the incarnation of the Sin, then yeah, it'd be weird if they didn't also have the worst traits (like with Helluva Boss, it's weird that Beelzebub stops Blitzø from... overindulging because he's sad?). But if they're just the ruler of the Ring that shares those traits but not fully embody those (like when they're fallen Angels and not personifications of those Sins), then it can still fit.
Me and my friend have a set of Deadly Sins that, while there's definitely bad traits they each have (especially the 'big three', Beelzebub, Satan, and Lucifer), but they're definitely not JUST evil (especially since our version is more like Order vs. Non-order and not Good vs. Evil). They were once angels and rebelled not for power, so they're not just hateful and deplorable (they, uh, definitely don't have only good traits, though. Especially Beelzebub and Satan, with Asmodeus once being worse than he is nowadays. Lucifer definitely doesn't have his good moments either. I'd say the least bad is MAYBE Belphegor in our universe.)
Sorry for this rant, and sorry if it seems aggressive in any way, I just love rambling and get passionate about me and my friend's characters :)
Thanks for the input— sounds like your story's going well. The great thing about these stories is the fact it is all open to interpretation. Anyone can take source material (i.e. the Christian mythos and other Abrahamic texts) and turn it into whatever they’d like. However, as with all fiction, I expect them to abide by the rules of their own established universe.
It's been established that in Viv’s universe, there is no War in Heaven. The inciting incident that cast the other angels down to the fiery conflagrations we all know and love did not occur here. As such, the audience is left confused as to how exactly the sins got here under the assumption that they, too, fell. There is one line that could hint towards their plight, but that could just as easily be read at them referring to Lilith's formation of Hell.
"[…] I knew that guy before he was anything."
This line is said off-handedly by Asmodeus in S2, E7: Mammon's Magnificent Musical and Mid-season Special. This could imply that they knew each other prior to their speculative fall, but it could also just as easily refer to their time as fledging demons in the beginning of Hell's formation. No where in the writing of either show does it give an adequate enough implication that these demons are, in fact, fallen angels. It would make more narrative sense (in the world Vivzie herself has set up) for each respective sin to be hellborne. And if they're hellborne (which I stress makes more narrative sense here), why would they not be emblematic of their sin?
Each sin (excluding Lucifer) has no indicators in their designs that they were once angels. If we are operating under the assumption that they too were high-ranking angels, why are they so visually different from every other humanoid angel we have seen thus far? Lucifer and Vaggie stay relatively the same, save for a hue shift, so why would each sin be so radically different in appearance post-fall?
Even if they were fallen angels, and just fell at a different point in time, why would they be seemingly disinterested in Lucifer? The other sins don't seem to think fondly of him; why would they roll their eyes at his mention in Mastermind if they suffered the same fate?
Does this honestly read as respect for someone who aligns with your viewpoint that both systems are corrupt? Do they look like they're even remotely similar to the appearance of a once high-ranking angel akin to Lucifer? It seems more like annoyance at someone foreign to your world stumbling in, taking over, and proclaiming themself your new leader. It's incredibly confusing.
Overall, while working in a vacuum, them being fallen angels in this universe makes absolutely zero sense to me. If they fell for similar reasons to Lucifer (i.e. rebelling against Heaven's supposed corruption), why aren't they touched on whatsoever in Hazbin Hotel's picturesque storybook retelling of events? Why doesn't Lucifer vaguely allude to the other angels' falls when explaining to his daughter that Heaven is corrupt? Why are they so visually different than other fallen angels? There are so many questions that can be raised here... none of which are answered within the show(s).
This is why you cannot sacrifice establishing your world over serialization. Since Hazbin Hotel's first season prioritized its high-stakes story over proper establishment of its worldbuilding, we're left confused as to how this world operates, and how close this universe (and its respective spin-off) is to the original bible's mythos. I wish Hazbin Hotel's first season focused on the world and characters as opposed to a high-stake war on Heaven.
I'd love to be able to tie these two together neatly and logically, but I just can't. Helluva Boss suffers greatly from being set in the same universe as Hazbin Hotel, but that's my take on things.
I'd love to hear you guys' thoughts.