Possible Original Characters?. (Patreon)

For a long time i was thinking on having an original character, because we all know how Midna is, or Rouge is, or how Jessica it's gonna react on certain situations, but i like to know if i'm able to have an interesting character from the ground up, having an Nobody McSlut, and turn her into a likeable character.

here's some conceptual illustrations made by Avalugg.

It's actually two characters, a bluish demon lady, and a red futa demon.

On the illustrations they have a military uniform, mainly because i love big breasted ladies in uniform.

i need your input, what you think of them?, interesting?, not interesting?, any change?.