There's some good points in here.
I've decided to split the group into three. I'd apologize for my shitty image editing if, well, I gave a shit.
View attachment 29616
These kind of look similar in design. One looks much more supernatural than the other but there's some similarities in dress sense and hair style and brightness of colour (even for the purple-black goth rocker). Like, if you told me these characters belonged in the same anime, I'd believe you.
View attachment 29618
These two kind of look similar as well - straight hair, more conservative outfits, more cute in style, slightly more muted colour palettes. If you told me these two were in an anime together I'd believe you, but if you then told me the previous two were also in that anime I wouldn't. I can't imagine the visual style of a setting where these two characters belong with the prevous two characters, they are too different in presentation.
As for the clown-acrobat...
View attachment 29620
Abomination. And, again, looks nothing like the previous two sets of characters I posted, and I can't imagine (and don't want to imagine) a setting where she fits in with either of the previous two groups.