Cordia is a much more tightly written character. Her appearance is a little too youthful for her stature and chronological age, however. The best and most poignant scenes in the game so far involve her (although she is way too forgiving, but I suspect we will learn why she is so with the MC later in the game).
But Luna, OMG, she is just an absolutely beautiful character. I agree, she is gorgeous and tough and naive and vulnerable all at the same time. I adore her!
It's weird how this game has such solid characters in its DNA, but in it's execution (no pun intended), it slips a bit. It can so on-point, like the first date with Gracia in town, or waaaaay off and downright cringe-worthy, like the park bench scene with the son of the other Don-- all the characters act like foolish 12 year olds and the dialogue reads like a poorly-translated teen anime!
Still, so many good plot-lines going on. I can't wait to see how these play out. It has such potential that the upcoming sex scenes, may seem tacked on or unnecessary.
Luna's facial expressions are also quite amazing. She melts me like that ice cream.