So Jinx has been established as a manic, impulsive, thrill obsessed lunatic but what's actually wrong with her? Some childhood trauma? Why are her eyes red? (conjunctivitis or just character building?) A fragmented personality from torture? Any hints or theories would be helpful, thanks as always guys.
She saw Urgot by accident while he was taking a shower
She probably has some combination of schizophrenia, psychosis, and multiple personality disorder, her guns being her other personalities.
My theory is that after living in Zaun for so long, he guns were the only things that kept her safe and that were 100% reliable in her eyes. So due to her being a high functioning psychopath with schizophrenic tendencies and thanks to Zaun being a pretty grim place deoending on where you live, as her friend's and allies left her because she was odd, died cuz Zaun, left Zaun all together because, again, Zaun, her psyche shattered and created a reality where her weapons were her friends that would always be there for her and support her while the world around her became her playground.
She also only dislikes Vi for abandoning her, she actually hates Cait because Caitlyn stole her friend,
stop trying to dissect her.. she's just the embodiment of chaos.. why can't you leave it at that?
Just going to throw this little line out there, do what you will with it;
: "Faces...fading in the flames. It was all her fault."
My personal theory is that Jinx had a trauma at younger age involving Warwick. Further information here: The Wolf and the Lunatic
I always assumed that Jinx was albino, and that she dyed her hair blue when it's naturally white. She has red eyes and is said to be unnaturally pale, so yeah.
I assume a few things from Swain's line when he collects a soul fragment from her: "Faces fading in the flames...it was all her fault." I've seen someone else who has the same theory as me: that her parents died in an explosion or a fire, she blames herself for it, and developed a massive complex due to that tragedy. There seem to be hints that Warwick and/or Singed was involved as well. Vi abandoning Zaun for Piltover might have been the last straw though, since the Wedding Crasher reveals that, deep down, she hates upper-class Piltovans for not understanding the hardships of the impoverished people of Zaun.
Assuming this, it does debunk the theory that Vi is her blood-related sister. They don't look too much alike, but Vi is explicitly stated to be an assumed orphan, or at least abandoned as a baby (I have a whole other theory about who Vi's parents are). However, Jinx and Vi were probably in the same Zaunite gang, and Vi might have even been her adopted sister. She and Vi were definitely close originally, which would explain why Jinx is so pissed at her for abandoning both her and Zaun.
Personally, I think her eyes might be naturally red. Akali has reddish-magenta eyes, and she's a human too. There are a bunch of other humans with more unusual eye colors as well, so it might just be a Runterran human thing. As for her original hair color, I'm almost certain it's red or orange-red, especially due to her Odyssey skin. A large majority of her skins portray her with red or orange-red hair (Mafia, Slayer, Star Guardian, and now Odyssey). Even Firecracker Jinx has red braids. Also, her default look has red eyebrows. Since she doesn't seem to bother dying those blue, I think that Jinx is definitely a crazy redhead.
Honestly she doesn't seem actually crazy just a psychopath obsessed with destruction. She seems crazy because casually killing people and burning their houses down for fun seem insane to people who actually care about life and property.
She is still grounded in reality as there's no indication that she doesn't know what she is doing. With quotes like "I'm crazy, see, I even got a doctor's note", doesn't really sound crazy as she recognizes that other's see her as crazy. She's also pretty smart, constantly outsmarting Vi and Cait, and even plans out her acts of violence to cause the most amount of effect as possible and get as much notoriety as possible.
This is a bit closer to being actually crazy. The Pyro honestly believes he's giving candy to babies and playing music... https://www.youtube.com/watch?v=n5n6OQXf2W4
