In the Neptunia series, Noire is a girl who looks in her mid-to-late teens, with a slender figure, red eyes, and long black hair. Her hair is kept tied into two pigtails with blue ribbons, and go down to her waist. Her fringe isn't kept parted and she has two bangs that go down to her chin. Her attire consists of a maid-like black top with golden trimmings and white frills around her upper arm and chest, and also reveals a certain portion of her cleavage. Her skirt is white with black trimming and is rather frilled compared to her top, and goes down to her lower-thigh.
Noire, in a word, is tsundere. She is a girl who thinks highly of herself and strives to be number one in everything she does. Noire often does and say things but tries to play it off as if there is no more meaning behind her actions. It is possible that she is a very caring person at heart but masks it with snobby, arrogant attitude in the hopes people will not see through her façade.
In the Neptunia series, her eyes are now cyan and her hair is pure white, and goes down below her shoulders somewhat, with her fringe standing above her eyes and bangs caressing her face. Her suit is black and white in color and the mechanical appearance is much more visible. It also exposes a mild amount of her cleavage. Her sleeves are pure black, with silver patches in the bicep and tricep area, her gauntlets are black with silver protrusions on the knuckle.
Black Heart's personality remains fairly unchanged in her goddess form. The only difference is that she becomes more aggressive and competitive than before, but other than that, she's basically the same.
Ninja Wars' Description
You can always count on me if you're in Heartland. Our friendship's already been battle tested, after all.
One of the 4 Ninja Goddesses.
Though caring for her friends, she finds it hard to be honest with her feelings, and she occasionally says some harsh things.
- Black Heart
Things are finally heating up. I'm ready. I'll send you all back where you came from!
The combat-specialized form Noire transforms into using the secret art, Transformation Command.
She is called such because of her black-based ninja outfit, "Cross."
Her personality becomes a bit more aggressive and confident post-transformation.
- Noire/Ninja Wars