oh so many things...when i first started jjk i had no idea who junpei was so her entire character took me by surprise. aside from my soft spot for characters who love movies i think it was just...everything about her and her story. her passion and escapism into violent horror movies as a balm over the loneliness and harassment she received in real life. feeling parentified in her relationship with nagi but also feeling like she has to shield her mom from what's happening to her at school. there was something innately queer about all of it. becoming a target of her classmates because she's the weird aloof classmate who likes movies. presumably she had friends in the movie club or at least people she was friendly with, which makes it all the more sad that they disbanded/left when they realized she was the target. wearing her dead mom's jacket when she goes to exact revenge on her high school bullies...her shikigami being moonjellies when the moon and ocean have very feminine themes. i feel junpei's arc is when gege really came into telling more of the story he wanted to tell instead of a typical shounen, and i think it was yuji's first heartbreak...junpei died, her mom died. no immediate family contacted them. no one cared enough to wonder where they were and accepted at face value that she "moved". sukuna laughed about the insignificance of a life he'd remember forever. so it's everything about junpei while she's alive and what haunts yuji after her death...heart breaking seeing the ghost of junpei's narrative pop up so much even towards the finale!!

it's going to sound really funny what my other secondary and tertiary ships are with junpei aside from juntoge...mahito/junpei and sukuna/junpei. with developing any ship dynamic i'm just prone to daydreaming? like if this was a show/movie, i try to imagine how it would play out. with juntoge it started as a joke in the sense of "lol i like both of them why not ship them / no but actually how would that work" ...with mahito and junpei i think canon is a good base. mahito is really like the older adult 'friend' junpei hangs out with and she says mahito is great and fine but she really doesn't have any solid answers for why mahito doesn't seem to have any friends aside from her, or any friends her own age..i think mahito/junpei is like a cat toying with a mouse and accidentally killing it.
sukuna/junpei was inspired by a one off comic i saw of sukuna bringing junpei back to life (after i finished its alive LOL) so...i think i can talk about this idea because the odds of me drawing it anytime soon are really low. i saw it being a one off doujin idea where like it's alive, sukuna brings junpei back to life, but junpei has some sort of dream connection with him. so every time she falls asleep and dreams sukuna toys with her until she wakes up. she never remembers any of this upon waking, only when she's dreaming. and sukuna, the "where are all the women and children" guy, starts forecefemming her and torturing her that way. very sadistic because junpei doesn't know how to react to this and how to separate her feelings from what sukuna is doing to her. she hates it and she feels horrible but something about it excites her. in waking life she starts to become more withdrawn, tired...yuji is worried. she seems even worse. i think this one could only have a bad end where when sukuna is bored the only mercy he grants is junpei dying in her sleep...it would be a bad end cherry on top of a bad end sundae. if mahito is the unaware abusive boyfriend sukuna is the intentional and calculated abusive boyfriend.

what i hope to see from fandom isn't...anything in specific? i love junpei love! i really love when people draw curse junpei and make her cute or like a little mascot..i'm a little skittish at times with seeking work outside of my own because i've had bad experiences in previous fandoms where some people who were fans of my work would cross lines and start imitating my art, and my personality, down to copying my profile layouts and exact photo headers...it soured my relationship with a lot of previous ships so i'm very protective of myself with what i have now. i don't want that to come off as snobby so much as...a skittish animal who will grab a few bites of food and then dart off. really, any love for junpei makes me happy.

thank you for the ask and nice words <3