Here’s the filebin for it.
https://filebin.net/u9lsp0ysgvuuvekq

https://www.youtube.com/watch?v=jtKkPhzF2cU

I’ll try to keep this short.

Lucky, though very skilled and agile, has one major flaw.
Due to his half Null transformed state, he struggles to maintain his mental health if his will has been broken or crippled. This flaw however is also half a strength, as if he were to take his mask off, the seal that holds the transfiguration are released, letting him fully transform and become much stronger, at the expense of losing his free will, becoming a servant to Null.

One other small flaw is that since he’s a Valkyrie, though he can fly, he needs sunlight to directly hit him in order to do so. Otherwise, he can only glide. So if it’s cloudy out or indoors, he loses a mobility mechanism. This can be somewhat negated however, if Emily is near him when he tries to fly, (as she is a Yellow essence wielder,) she can create enough sunlight for him to at least take off.