Dragon Striker Theory
SPOILERS AHEAD. YOU'VE BEEN WARNED
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okay so, there are images of Key in the dragons uniform.
and even an image of him not with the knights during a match
but he seems forlorn about it. Like he wanted to stay but couldn't.
However, we also know the knights have their other matches!
Vs the roses and dragons. Key and Rags literally fight. like that ain't even Gorotama no more, they're just in combat.
here is my theory:
What if there is a bet or stipulation to a match? like someone says. "if the knights lose to the dragons, Key joins the dragons team."
and being as competitive as everyone is, they take that bet.
I honestly don't think Key would join the dragons for shits n giggles. or even because his mom was on the dragons. All his friends are on the knights, he seems proud to be there with them. I think they gambled.
Ok so discussing leaks here so further spoiler warning
So we know from the file names for the leaked screenshots which episode they correspond to (I have my own post listing all of them) but it paints a pretty alarming picture.
We know for a fact that Key doesn't defect until at least after the Roses game, possibly the Roses rematch since the game against them that those face-off screenshots happens on the Knights' field but BEFORE winter. If I had to guess, I'd say probably either episode 13 or 15 (16 is confirmed to be the Dragons game on their field, 14 and 17 seem to be focused more on the mysteries of the school, 18 is confirmed to be Knights versus Roses on their own field, 19 is the winter game that seems to be where the shot of Key looking at Ssyelle from the stands is from, and Key is with the Dragons in 20) is when the Knights vs the Roses on their homefield, and honestly I'm kinda thinking they might actually hand them their first loss because it would explain why Key seems so determined to beat them in the game on their field.
Which leads me to this brief scene.
That's the Roses' field. They're the only ones who play in a stadium with a glass ceiling.
So here's my theory; Key loses control again during the Roses homefield game. Bad. So bad it leads to this reaction.
This isn't actually from Revelations. I checked. He gets this shellshocked horror at his own Tama again. Presumably he hurts someone, maybe even multiple people, and without even the kind of self-defense justification he had with Casper. He at minimum wrecks the Roses' stadium.
And then of course after that he can't stay with the Knights anymore. Either he doesn't trust himself or he doesn't want to risk hurting them. I don't think Ssyelle would kick him out, so I'd assume that him leaving is at least partially voluntary.
Now as for how he joins the Dragons, I'd assume it's either a. One of their members is able to keep his Tama in check (likely Skadi, Ragno, or Sugoi. Probably one of the latter two but hey I'm trying to manifest Skadi some plot importance here) so he joins them in an effort to keep himself from hurting anyone else b. In his lowest moment, possibly in the wake of some reveal about the Knights' past or his mom in addition to losing control again, he decides he just can't be on the team anymore and joins the Dragons to try and live up to his mom's legacy. c. (least likely) Sugoi somehow extorts him into joining. This wouldn't really fit with her character up until this point, but at the same time I could see it happening in theory. It also wouldn't line up with her expression in the one screenshot we see of her with Dragons!Key where she seems a little concerned.
