What's your hc on Ghouls nature in the Animal Kingdom or beyond? They're probably mammals, but I also think them being like another class, kingdom, invertebrates whose bodies overcame predatory mimicry as their ancestors rose to sapience is also interesting.
Oh that's a really interesting headcanon!!
Maybe just bc I love irl invertebrates and love canon kagune but I'd love to see/explore a take about that!! 👀
As for me, I'm not that educated on biology and phylogeny / taxology so I don't have much to go on. I mostly just read other fans' biology headcanons and nod along and assume they know what they're talking about XD
Outside of my heavily divergent AUs I prefer to stick close to canon, so I more or less prefer and go with what the series implies and what fandom's been theorizing forever:
That ghouls used to be human, until something happened that essentially evolved them into a new species / subspecies.
I like the idea that the kagune itself used to be it's own creature but somehow combined with a human and created a new species (the fact that in canon a kakuja kagune or quinque has a level of sentience, and then mixing in the idea of parasites (X) and even lichen (X))
I also like the mystery of it, the unknown. How ghouls by nature of not having long lives probably don't have much family history nevermind species history. And how the CCG is so corrupt that any "research" they do is so focused on the Washuu's personal goals. And anything else probably gets so warped to be false propoganda. I think, in-series, no one truly knows what ghouls are or where they've come from. (Except for Kanou's group. Maybe. Barely.) And I think that's something that'll finally be properly and respectfully researched post-canon once peace truly gets going.
This particular AU started as exploring the inhuman side of ghouls and over the years ended up turning into ghoul worldbuilding. Most of what I come up with is very much just "wouldn't it be cool if—?" that I run away with and write for fun. A lot of it probably won't be "canon" even to the au in the end.
Like. I've expanded ghouls to include purring, glowing eyes, heat cycles, unhingable jaws, etc. I'm just having fun now versus trying to come up with a cohensive biology or evolution line.
I gravitate towards aspec takes, but lately I've been into the idea of an allo ghoul Kaneki, who has a lot of anxiety about dating humans, and a good while after Hide finds out he's a ghoul and accepts him, they're talking and Hide goes on one of his typical "I accept you" speeches — except something about his wording hits hard in a way it hasn't before, and Kaneki realizes that Hide doesn't just accept him in passing or despite being a ghoul, but truly and entirely as he is, and sudden the floodgates open and his heart swells and Kaneki realizes...
Oh. Oh hold up... he likes Hide.
...He likes Hide?! When did that happen?! Has he been... repressing this?!
Like, he leans more towards being attracted to humans than ghouls, but safely dating a human and having it work out long-term had been a pipe dream so he never bothered. It's just been this pure fantasy for all his life.
And in this moment he just... goes through this little checklist and realizes that Hide in fact... hits all of his standards...
Knows he's a ghoul ✅
Accepts him as a ghoul ✅
Easy on the eyes ✅
Nice, friendly, kind ✅
Patient, respectful ✅
Intelligent ✅
Bonus Points: Already have a connection ✅
And Kaneki just has to sit there with with his heart racing and pretend to be normal and like he doesn't really wanna kiss him right now.
(And then Hide finds out and laughs heartily and finds it adorable and flattering and kisses him the end.)
I am fascinated by and technically subscribe to all the fans doing biology meta about how ghouls can take drugs the same as humans, and how between Nishiki & Kimi being med students and ghoul society probably being pretty good at smuggling and distributing items amongst each other, getting access to said drugs probably isn't terribly difficult,,,
but the whump fan in me who wants no pain relief, all soft pained gasps and twitches... says no to that in this fic
@HidekaneHeadcanons* liked writing oneshot!Kaneki and wrote a bunch of Hidekane oneshots that I really liked
(*Their blog is sadly deleted, but I went back and archived their fics I had reblogged on my main here. The "read more"s are broken, but all the AO3 links work as they simply orphaned them.)
And from there, I was inspired to also think of my own ideas featuring a full ghoul Kaneki, and I decided to specifically think about how Tokyo Ghoul's story would go if Kaneki was a ghoul from the start - how that would change his past, personality, his relationship with Anteiku, and his friendship with Hide
I first wrote and posted "Life As A Ghoul" to AO3, but it was definitely my weakest writing and just sort of a copy-and-paste of canon. I ended up deleting it because I hated it and it wasn't working lmao.
But the basic concept of a full ghoul Kaneki au never left me, and finally I came up with a good idea: "hey what would be the most fucked up way for Hide to discover that Kaneki was a ghoul?"
And I wrote that, re-using the name Life As A Ghoul and posting it to AO3. And after that introduction, it quickly became a really endearing fic of unconditional love and some ghoul & character building.
A few years passed, it went on an indefinite hiatus, I got out of Tokyo Ghoul for a while, but my love for the series remained and through it all I was still obsessed with the idea of a full ghoul Kaneki.
Eventually I did a manga re-read and also reread my fic, wanting to get back to it. Except... I had done a lot more analysis during that manga reread, and a lot of my understanding, takes, and headcanons had changed. Additionally, the original dark concept kind of caused me to write myself into a corner of where to go from there.
So! Instead I decided to try to "revamp" the au.
The name "Life As A Ghoul" had only ever been an easy placeholder title (Literally a phrase picked out from a sentence in the fic I had emphasizing Kaneki's difficult life as a ghoul).
But now I had the perfect proper name for the au fic:
Two Steps Forward, One Step Back
Because the whole concept that always grasped me was Kaneki's ghoul side and true self being revealed to Hide, and Hide loving him unconditionally, and yet between Kaneki's shame and the struggles of a realistic predator and prey relationship... their journey to strengthen their friendship ends up being "two steps forward, one step back". Each time they made progress, something seems to knock it back a little.
And then for whatever reason, since February of this year I got really into ghoul worldbuilding and doubled down on it so hard.
(I also constantly wrote tons of other full ghoul Kaneki reveal oneshots on pure whims)
At this point... the au and fic barely have a plot. And I'm not really sure it ever will?? But I've had a hell of a fun time writing adorable and angsty unconditional hidekane love and acceptance and just growing my worldbuilding headcanons.
So, here we are... A place for me to ramble about it, and post some of the random fun stuff I've made for the au.
(An offshoot AU where Kaneki is still a full ghoul, but never met Hide until they were adults)
Sheep In Wolf’s Clothing - Madilyn Mei (“i'll blow your house down / if that's what all the other wolves do / and i lie i lie i lie i lie awake at night / counting all my old friends as i try to fall asleep / forgot what they, what they, what they, what they look like / i hope that they have not forgotten me”)
I’ll Be Good - Jaymes Young (“i'll be good, i'll be good / and i'll love the world, like i should / yeah i'll be good, i'll be good / for all of the times that i never could / my past has tasted bitter for years now / so i wield an iron fist / grace is just weakness / or so i've been told / i've been cold, i've been merciless / but the blood on my hands scares me to death / maybe i'm waking up today”)
Karma - AJR (“cuz i've been so good, i've been working my ass off / i've been so good still i'm lonely and stressed out / i've been so good, i've been so good this year / and i've been so good, but it's still getting harder / i've been so good, where the hell is the karma?”)
Sober Up - AJR (“last time that I saw your face / was recess in second grade”)
Lil Red Riding Hood - Amanda Seyfried (“i’m gonna keep my sheep suit on / ‘til i’m sure that you've been shown / that I can be trusted walking with you alone / Little Red Riding Hood / i’d like to hold you if i could / but you might think i’m a big bad wolf so i won't”)
I Know I’m A Wolf - Young Heretics (“i've captured you once, but I wasn't quite right / so I'm telling you, that you'll be safe with me”)
Get Out While You Can - Get Scared (“so trusting / stop feeling sorry for me / don't touch me / i'll never leave this place / i'll only let you down i'm fucking sick, believe me / i know i'll find a way / to pull myself from the grave”)
Strange Sight - KT Tunstall (“you have a cold heart / you’re reckless and distant / but i’ll be persistent / i will understand you / strange / how i’m drawn to the danger / i’ll reach out my hand to you”)
Monster - Dev (“most people are scared / when they look him in the eyes / all they see is fear / let me make this clear / i want him near / most people can’t sleep / feeling he’s out on the streets / he is my creep”)
Get To Know You - Tina Dico (“i've never pushed to break through your defences / that's not why i'm here with you at all / stranger, i just came to get to know you / just to sit next to you for a bit / stranger, i just came to get to know you / wouldn't it be a shame if I never did?”)
Morally Grey - April Jai (“they say he's morally grey / what can I say? grey's my favorite color”)
Be Nice To Me - The Front Bottoms (“you’re a killer / and i’m your best friend”)
Bite The Hand - BoyGenius (“who do you think you are? who do you think i am? what do you want to say? what do you think will change? maybe i’m afraid of you”)
Love Into A Weapon - Madalen Duke (“when I turn my love into a weapon / my heart has teeth / don't make me have to use them”)
Messed Up - Once Monsters (“you'll be the death of me / so bring me my coffin please / so happy in misery / i think you're my savior / i know my head's not right / i think too much overnight / but in you i see a light, let's be more than strangers / you say you're scared, i'll take you there”)
Cold-Blooded - Beth Crowley (“i tried my best at playing nice / but it's a cutthroat world, so I'm guarding mine / weakness is as weakness does / to stay alive is not good enough”)
Duality - Set It Off (“i can’t quite contain / or explain my evil ways”)
Two Evils - Bastille (“i'm the lesser of two evils / or am i tricking myself nice? if i'm the lesser of two evils / who's this man, who's this act I hide behind?”)
Used To The Darkness - Des Rocs (“yeah, would you take my hand and take a life? i'm too damn young to give up on the light / i'm used to the darkness”)
I Didn’t Ask For This - Beth Crowley (“cold rage / hides the shame / of images i can't escape / scars that live under the surface / it's strange / what i became / when part of me was ripped away / and replaced with something worthless”)
Too Late For Me - Beth Crowley (“strip me down and / lay me bare / cross your fingers / something's there / can't see what's underneath / the darkness runs too deep / i just keep on hoping that it's not too late for me”)
Cold-Blooded - Beth Crowley (“i tried my best at playing nice / but it's a cutthroat world, so I'm guarding mine / weakness is as weakness does / to stay alive is not good enough”)
TRINITY - Snaggletooth (“i want to find you / i wanna find everything / everything about you / i want to know you / i want to know everything about you”)
Come Alive - Beth Crowley (“i am a wanderer / i never needed anyone / but you've stopped me in my tracks and / i like the way you scare me / so let's leave the past behind / the future's anybody's guess / just give me right now baby / i don't want to keep my distance anymore”)
Songs that fit my various oneshots in my au featuring a natural-born ghoul Kaneki.
Sober Up - AJR (“last time that I saw your face / was recess in second grade”)
What It Sounds Like - HUNTR/X (“nothing but the truth now / nothing but the proof of what i am / the worst of what i came from, patterns i'm ashamed of / things that even i don't understand / i tried to fix it, i tried to fight it my head was twisted, my heart divided / my lies all collided i don't know why i didn't trust you to be on my side / i broke into a million pieces, and i can't go back / but now i 'm seeing all the beauty in the broken glass / the scars are part of me, darkness and harmony / my voice without the lies, this is what it sounds like”)
TRINITY - Snaggletooth (“i want to find you / i wanna find everything / everything about you / i want to know you / i want to know everything about you”)
Willard! - Will Wood (“if you can see in shades of gray, the colors are much clearer / oh my friend you've got a friend in me, let's go and make more enemies”)
I Know I’m A Wolf - Young Heretics (“i've captured you once, but i wasn't quite right / so I'm telling you, that you'll be safe with me”)
I Know I'm A Wolf - Discovery of an Afterlife [BACKUP] (“and i've been raised to kill / but the thought of fresh meat / it is making me ill”)
Heathens - Twenty One Pilots (“it looks like you might be one of us”)
Nightstand - Dev Lemons (“replace me with someone easier”)
Villain or Hero - Beth Crowley (“i've been right on the edge of a knife / caught between being a villain or hero / you have no idea what it's been like / coming to grips with the fact that i'm dangerously close / to becoming both”)
Inside - Chris Avantgarde & Red Rosamond (“if i were you i’d run / if i were you i’d hide”)
Dark Star - Jaymes Young (“but there's things about me that you just don't know / if I told you where I've been / would you still call me baby? / and if I told you everything / would you call me crazy? cuz baby I'm a dark star, a dark star”)
Running Up That Hill - Placebo (“and if i only could / i’d make a deal with God / and i’d get him to swap our places / be running up that road / be running up that hill / be running up that building / if i only could”)
Centipede - Knife Party (“even tarantulas aren’t immune from an ambush / this centipede is a predator”)
I / Me / Myself - Will Wood (“i wish i could be a girl / and that way you’d wish i could be your girlfriend, boyfriend”)