That's actually why I like the 40k daemons so much because each type has so much personality and character to it that they feel like a series of interconnected species
@Schlo
So like the Bloodletters of Khorne capture the bellicose and utter fury they represent by taking design cues from a multitude of sources such as sharks and bulls, whilst keeping traditionally daemonic aspects to them which combine into a creature that looks like its ready to spill blood in an utterly degranged assualt
Similarly, the Plaguebearers of Nurgle, and the nurglings which are often seen as minor daemons who squish with cartoony and exaggerated expressions, captures the nature of Nurgle as both a bringer of despair, with the rotting husks of the plague bringers and their diseased and rotting figures capturing the twisted and unholy nature, and a twisted embodiment of perverse joy and child-like happiness, with the friendly and mischievous nature of the nurglings contrasting their blighted and grotesque appearance for cartoonish results.
I could go on about the contrasting animalistic influences on Slaaneshi daemons and how they capture the hedonistic and primal desires of Slaanesh or how the twisted forms embody what Tzeentch represents, but I think you get my point. It's a shame that often for Daemons in isekai we get the same old "succubus, bull monster, etc." with mostly western influences and Japanese of how daemons appear, and seem to follow the same stereotypical patterns. I'd like to see more creativity with daemons and how they act, their general designs, as well as how they fit in universe thematically and lore-wise.