Here's my designs for Ben's aunt and cousins, based off Ben's aunt and cousins from the miniseries
All of Ben's family members aren't present in the movies, but my head cannon is much like the miniseries Ben moved to Derry to move in with his aunt and cousins for economic reasons cause his dad died overseas and his mom was just a housewife. The house we seen in the movie is Ben's aunt Jean's house.
Jean has been divorced multiple times, and every time she has been the reason why. She basically drove all her husbands insane, and funnily enough- none of her husbands are her kids dad. The twins don't know who their father is and they don't care.
Jean grew up very spiteful and jealous of Arlene because she was pretty and well liked and Jean couldn't fucking stand that. In retaliation she became a tomboy and utterly obssessed with competition. EVERYTHING is competition when it comes to jean, so she was a miserable bully all through out her childhood. Her design is based primarily off of heather duke from heathers, but her child design is very reminiscent of that one girl from the loud house and foxy loxy from chicken little.
Andrew and anthony's deigns are losely based off of zack and cody, given that i wanted them to be interchangably annoying- personality wise they're based off of the twevils from bratz and si and am from lady in the tramp.
All in all Ben's life living with them is total dog shit. Andrew and Anthony are his older cousins (They're 14) so they like to call Ben their "big little cousin" as a jab at his weight. Jean and her kids are both totally obsessed with how fat ben is and never shut the hell up about it, and when anthony and andrew aren't ganging up on ben like cinderellas evil step sisters they are constantly beating the crap out of each other or screaming. They are so adamant about never sharing anything and how they're totally different from one another, despite the fact that they're both interchangably annoying and have no other defining personality traits. They're the whole reason Ben spends so much time in the library cause he doesnt wanna go home with those two fucks running through the house. They particularly like to embarrass ben whenever bev is around, cause they think it's funny.
It's worth mentioning that Ben's aunt constantly complains about Ben being spoiled by arlene, ya know, the fat kid whos dad got blown up overseas and is currently being bullied at home and at school 24/7, HES being spoiled- meanwhile anthony and andrew get handed EVERYTHING. Ben's like "auntie can i go to the library" and she acts like he's trying to ruin her life meanwhile Anthony's trying to throw Andrew through a window.
Anthony and Andrew's abuse of ben is interesting because unlike henry who he actually can kind of stand up to Ben feels scared to ever stand up to them because they're related and he doesnt want them to complain to their mom and get him and his mother booted from their house. Its a real sad situation :/. All the losers would totally defend ben if they made fun of him in front them, bev especially always defends him when they wanna bother them.
It would be really nice if Pennywise killed these three but unfortunately, much like Gretta, some people just never learn or get punished.