My Deduction: Sera's Identity

*** I know about the 'someone' mistake. It's 10 am, I haven't slept, and the text was a pain in the butt XD****

Okay, I was talking to Torosiken and I read like, the first three pages of file 800 and then it hit me.
SERA COULD SO BE AKEMI
_{THIS IS SOMEWHAT RELYING ON AKAI BEING SUBARU THOUGH}
I have good proof on that too, but nothing I would want to say aloud for those who didn't get as far.

Here are my reasons:
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- She knew Conan was Shinichi the minute she saw him. While she was 'dying' he didn't hessitate to give her his real name.
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- With the fact that she believed him so fast and gave him prominate information, it lead me to believe she already knew what the poison did
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-Akai knew her and knew Gin. If he was helping her escape, there was no way she'd fall so easily. He probably had it set up to make it look like she died
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-Conan, for once, never made sure to check if she was dead. AT ALL.
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-The quotes with this in mind just make so much sense
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-She comes only after Akai is gone and, if she was really a sister that was hidden to be kept out of danger there was no way she'd be able to find out he had 'died'
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-Because of how she grew up and even being around Akai, this explains her less tolerant ways with how to handle a sitatuation, no matter how inteligent she can become.
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-Because she was in love with him, and DID grow up in the BO, then I think it's logically she would change her apprence
... and what better way then to look like the person she loved and was coming back to fight for.

*If I forgot anything else I'll try and add it later

WHAT I BELIEVE COULD HAVE LOCIALLY HAPPENED:
Akai helped her escape and, along with taking the poison, she hid herself.
Akai didn't want her to be in danger because of him and he wasn't giving up, which is why he's seen missing her, but not griving for her.
I believe he was following Ai because he had made a promise to her to help her sister escape, and he wanted to make sure it was her before he made any move to do anything.
Because they weren't together and, along with her looks, I figured she made up some stuff in her 'new life', whereever it was (due to recent chapters maybe Vermouth found out about her and Akai. It's not like she doesn't know everything else that's happened and who's who)
As for Sera herself, I'm sure in her new life saying his name would have been dangerous and, seeing as she's still a bit young for a boyfriend (and it might hurt since she can't be with him) she may have been calling him her brother and responded that was on instinct.
I think she came back because Akai stopped contacting her. I dont know if he's really alive and why he wouldn't have if he was, but something along those lines becuase she DOES think he's dead.
Because Shinichi helped her so much, and due to the fact that I"m sure she'd want to get back at the orginization as well, it's a logically expliation for why she knows how to fight and why she's a good detective.
This also explains her interest in both Conan and Ai

And I think that's about it XD please tell me if you agree or disagree and why because I"m really curious and I never heard anyone come up with the same I idea of it being her as I have.