Ah! thank you so much!! nwn
Uhm, for my oc, I was thinking in between chevaliers.. creatures who appear to be human, with no obvious signs of race or creature.. but by choice or unconsciously--depending on how in-control they are of their emotions-- can change into a creature with the same kinda characteristic of a akuma/demon. Their pretty much have the same fiendish level of a akuma/demon in that creature mode! They can change by choice, emotions (anger, sadness.. usually anger triggers it), or just because they haven't nourished their blood lust enough.. (but they can get pretty cranky if they don't.. so it's obvious when their blood thirsty)
I'd call it half akuma, sense a full akuma would be.. always being in creature form without a conscious and being aware of it like a half akuma would. It's a pretty simple concept of "human" to creature.. vampirish.. kinda thing, but it has a lot more depth and detail than that if you'd likkkkee me to go more into detail! Ah sorry for babbling;;