(I haven't read Black Cat. I just know that Yami is more or less a carbon copy of her. And Emeralda is my favorite character in Xenogears. (Skip to 2:30 of the video to see her in action.) Though the sound of her voice... X_X)
Hell hath no fury like a woman scorned because only women can give two tits for every tat. ♥
There is no think only do. If you liked Tu Love Ru's art, then I'm sure you'll like Black Cat, which as you likely already know was writen by the Artist for Tu-love-ru.