Nina's story doesn't make sense
Honestly I just don't buy Nina's story at all.
This is a world where Metahumans exist and are somewhat known, I mean with the Bride's flashback fights with Frankenstein, it was obvious she was pretty successful finding public jobs for centuries without anyone caring she was undead or anything. This is a world where Aquaman exists and all of Atlantis, sure that's probably not public knowledge when Nina was growing up, but eventually it'd have been known. Yet a photo of a "fish person" living near a sewer is enough for a bunch of people to go hunting and imprison her? King Shark and Killer Croc exist in this world and have been around committing crimes (Well King Shark is, dunno about Killer Croc but Batman exists so presumably he's out there)
She is the daughter of a brilliant scientist and although he homeschooled her for most her life, he didn't hide her from the outside world. She even went to a private school, people would KNOW she existed, her father absolutely has the documents and ID to prove she's his daughter. Yet that's all thrown out the bag, cause "oh look, a fish girl. Let's go kidnap her, because we can legally kidnap whoever we want for no reason" this isn't ICE, they can't just take girls off the streets and throw them in monster prison just cause she ugly (according to the blind people of Star City, we all know she beautiful <3)
If Aquaman thought Nina was one of his subjects, he would threaten war to save her, dude has threatened war for less. If Superman saw this innocent girl being thrown into prison for her appearance, he'd absolutely save her. If Green Arrow (they're in Star City, pretty sure that's his turf) saw on the news "oh look, fish girl in sewers. Lets go kidnap her for experiments or something" he'd get involved and help her (depending on green arrow I guess... But the hero GAs are generally good dudes)
Nina LITERALLY didn't commit any crime ever, I know Amanda doesn't usually give af, but Nina also didn't have any exploitable powers beyond being a fishperson and considering she also has King Shark to use, Nina was massively pointless, shouldn't even have been in prison and especially not part of Waller's suicide squad2.0. Fucking Weseal had a lawyer, trying to help him get off because he was innocent. Where the fuck is Nina's lawyer? Her father, who was white and a well known brilliant scientist, was shot in public by the police on camera, while his daughter was being arrested on camera for the crime of looking like a fish person.
She was just in the story to tug at our heartstrings and befriend the Bride and GI Robot, sure it worked and the story would have been lamer without her, but there's no way she'd have been part of it at all. I've seen some people say Waller put her on the team for emotional manipulation or something, but why the fuck would Waller care about that? She doesn't care about the teams emotions, she has shock collars and bombs inside of them, she can and will use them however the hell she wants and they know it. Heck King Shark could have fit the same role as "emotional manipulation or whatever" because he acts like a silly goober which tugs at people's heartstrings.
Nina's story, from being imprisoned into Belle Reve to thrown into Suicide Squad2.0 just because she looks like a fish, in a world where King Shark, Superman, Aquaman, Magic, etc all exists just makes no sense to me.
Heck even the teenagers bullying her felt very lazy as well, I know kids are stupid and dicks, but they kept calling her a frog despite frogs being amphibious and she clearly couldn't survive without water. Plus she looked more like a fish or the creature from the black lagoon. If you're going to bully someone, bully them right. Those were pathetic attempts at bullying