Hidden Disabilities {A Kingdom Hearts 3 Fanfiction}

Okay so for this fan fiction, I'm making the OC me. I've had this idea in my head for a while and I'm going with it. I'm putting myself into Kingdom Hearts with all my disabilities that I have and I am who I am. Just in Kingdom Hearts. This takes place during and after Kingdom Hearts 3 and it will include things that happen in KH3, but also things that don't happen in KH3. I'm doing my own little thing here.
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Caiden is a disabled keyblade wielder who used to be one of the Princesses of Light, but now that he came out as trans, and he let Darkness take over him in the form of depression and anxiety, he no longer is a Princess of Light, not even a Prince of Light. Late one night as insomnia overcomes him, someone enters his house. Someone who he used to be very good friends with. This someone attempts to take him out as he still thinks Caiden is a Princess of Light. Things happen and Caiden ends up helping Sora, Donald, Goofy and the others help take down Organization XIII, but here's the thing, Caiden is hiding something. Something that'll ultimately help Sora and the others in the long run. But there's a catch. It wipes Caiden out to the point of unconsciousness every time he uses it. Should he really be helping everyone?