[@Akayaofthemoon]
Great, thank you!

I don't know how the game decides it can't put a character into a color in canon, but I was thinking he might be Unknown because, along with the other-worldly nature of his avatar's body, he can fit into any color when looking at fighting style (like ADamnFiddle mentioned), [i]and[/i] at the same time doesn't fit into any of them when going by Yuuma's desires. In fact, Yuuma's not even 100% sure himself why he wants to shut Brain Burst down, which is his only goal with installing the program (my first post will have more on his desires, but the gist is he goes around saying he's doing it to protect all of Brain Burst's users, but that there's [s]probably[/s] definitely other, more selfish and petty reasons along with that one). 

You guys definitely know better about the colors, though, and I'm fine with him being categorized as anything. Whatever fits him best works for me.