What are you talking about "utter lack of ass?" From what I can see at this angle, and my extensive knowledge of the female ass, I'd say she has an exquisite ass for her body size, rather shapely in fact.
Probably the best illustration of Cassandra & best illustration of kansuke at the same time. Love the pointless armor on her shoulders. Yes, that will surely protect your unprotected/unclothed breasts and thighs. Damn, her breasts are so huge, bigger than her head. I love how they hang down from her chest while you can also see her erect nipples through her tight costume. And her ass is fine as well! Not as supreme as her breasts, but you can still clearly see the outline of her ass through her tight dress. Also love how she's biting on her bows for no real reasons. Makes her look like a cheap slut, but can't expect more from a woman who's dressed up like a cheap slut.