Body language has such a HUGE impact on how a character design comes across! I doubt I'd notice or care about the skin-exposing outfits worn by superheroines half as much if every shot weren't focused on THRUSTING and TWISTING the exposed and tightly-covered body parts for the camera. Again in Saiyuki, Lirin has proportionately large breasts, but she's seldom sexualized through the way she acts and carries herself. In the picture above, her position makes for HELLO BOOBS, but that wide hands-behind-neck pose is one I've seen most often used by shonen heroes like Ranma and Naruto.