Just give him a minute, guys...

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Just give him a minute, guys...
They figured he missed flying the gummiship, but its probably for the best that it stays parked...
Have they ever actually explained what the whole anti-sora form thing is all about? I always assumed it was a weird side effect from him being a heartless for a bit
Is anti-form originated from when Sora got turned into a Heartless? Nomura: Story-wise, yes. Drives are very strong so anti-form exists as a side-effect of using too much power. System-wise, I wanted to create something strong but troublesome.
...is what Nomura said in a 2006 interview.
iirc the fandom speculation is that since Anti-form happens if you use other drives too much. It might be that Sora "uses up" too much light at once and thus the darkness in him takes over for a moment, something along those lines. It's almost like Sora is more easily susceptible to the darkness after being turned into a heartless, and even Kairi's POH power couldn't remedy that.
With the appearance of Anti-Aqua in KH3 it also has the implication that Sora loses hope/succumbs to the darkness during a tough fight. And while we are on the KH3 topic:
There's a form that appears called "Rage Form," which reminds us of the "Anti Form" from KH2. What is the setup behind that? Nomura: The forms in this title are very different from that of KH2, so we decided to change all the names. Rage does indeed have characteristics that are reminiscent of Anti, but it's basically a separate thing setup wise. Anti is based on Sora getting completely stained in darkness, but Rage doesn't go quite that far. It's based on him going into a rampage state, controlled by feelings of anger.
from a 2019 interview.
Interesting that even though Sora has a shorter fuse and is angrier in KH2 (idr if it has been confirmed or if it's fanon speculation that it's due to Roxas in his heart influencing him and his heart remembering the pain and anger of CoM), it is only in KH3 where he is shouldering so much he snaps into a literal rage, specifically if he is damaged enough. He doesn't lose hope (yet), he gets pissed.
Considering the implications that there could be a part of Vanitas still in Sora it is currently hard to say if that rage stems purely from him or if Vanitas is feeding into it in some way.
It is actually one of the things I am hoping for the most in KH4. The build up has been going on for a long time, both through these forms and through his companions saying hurtful things to Sora repeatedly (it's often in a playful manner but that doesn't mean...it isn't mean. And KH3 really hammers this home.) and Sora's "Without my friends, I am nothing." may have scratched the surface but there's so much more to it.
Sora has a lot of pent up hurt inside him, Aqua being a direct parallel ingame. Aqua eventually succumbed to it because she was alone for so long. And now... Sora is alone, possibly missing memories or heart connections he needs to hold himself together. Yeah Strelitzia is there but that might not be enough. But let's stop here I could go on for hours.
Hello, Darkness, my old friend (Show and Tell, Part 2)
I have a save on KH2, and I think I broke it, but I can no longer use any form that;s not Anti-Form.
Only Anti-form.
Literally I was trying to lvl up other forms, and I turned into Anti-form 5 times in a row, then after I did 1 Valor then 4 more Anti-forms...
I think I broke it.
Do you have any kind of head canons about Sora's Darkness/Heartless and how it perceives Kairi? I've seen people write it as being lethally possessive/protective of Kairi since it owes its existence to her in part, or as a considerable threat to it since she's also its main obstacle in getting Sora to relinquish control over his heart and body to it.
Oh that's a good question! Generally I've gone the possessive/protective-of-Kairi route with Anti-Form/Rage Form. Anti-Form/Rage Form is, in my mind, Sora's raw, primal instincts without his conscience or regular cognition keeping things in check. Hence why he fights with his bare hands with it in KH2. Though with Rage Form allowing you to use Sora's Keyblade in KH3, I do think it's evolving/Sora is gaining more control over it (or is it getting more control over him? Food for thought). I thought the moment where Xehanort took Sora's light and it forcibly transformed him into Rage Form in KH3 was really interesting too because it indicates this is a lore thing and not just a gameplay thing.
But anyway, all of this is to say that because one of Sora's deepest instincts is to protect Kairi, I could still see Anti-Form/Rage Form doing its best to protect her. I do really like the idea of Anti-Form/Rage Form considering Kairi a threat though, since she has a heart of pure light and keeps Sora from giving in to his darkness though. Would be interesting to see Nomura explore this all more.
I do wonder how Rage Form will further evolve in KH4 though--imagine how it would look in the more photorealistic style, could be the stuff of nightmares lol. I also would be intrigued by it coming out around the other characters more like it did around Xehanort. I think it would be interesting to see how everyone reacts, to say the least.
Thanks for the ask!
Untitled (Corner Piece) - Robert Morris