Yami: You may have the Keybearer slot. And yes, you may twin-wield if you'd like, so long as you collect the Keychains properly. You'll have access to the Kingdom Key and possibly the Keychain of your world of origin to start. The second half is a little... how to put this... ill-advised for the start of the RP. If you can work it in {if the RP lasts long enough to provide the opportunity as well} you can spend time as a Nobody- there can be a new Organization forming, but the Society may largely over-shadow it- and reform to become human once more. The only problems I have with you starting out that way are a) it's been over two-hundred years since the Organization was defeated, so you couldn't use cannons or the Organization itself, and b) it over-powers the Keybearer at the start of the RP, where it's supposed to be the development of your power throughout and c) the ability to transfer through shadows negates your need for a supporting party and Gummi Ship problems. ^^; Those are always rather entertaining.
Free: Psychosis is alright, but try and narrow it down to something very specific... something like 'the feeling of being watched'=paranoia, 'the feeling that many other people are are around you'=schizophrenia, 'the feeling of the urge to kill'=homicidia, etc, etc. Just general 'crazy' isn't quite an emotion, but more of a state of being.
Notice: The IC thread and OOC thread with character sheets will be up tomorrow morning!