Translation done, but obviously we really need some native speaker to match the author's relatively high writing skills.
The growth of her body follows the most girly direction, even among her attractive sisters. While being slim and tender, that fruitful fat on her body does add much unbalance to it, but at the same time adds a mixture of attractiveness of both "woman" and "girl", which is something that could only be harvested by a girl of this age.She has the best body build among the light cruiser girls; you can feel her high athletic ability even at a single glance. Her shoulders are wide and as her waist is so firm that her silhouette looks somehow like a big top-down triangle rather than a typical ellipse. What an athlete.You can feel much softness and tenderness all over her body, and she must be one of the most meaty. This somehow makes her so distinctive among the ship girls since most of them are thin, but it definitely doesn't mean she has a weight problem. I think it's much better to put it in this way: her plumpness adds much graceful roundness to her body curve, endowing her with a special charm that those thinner girls can never have.She's quite different from her glamorous sisters. But I don't mean that her body is undeveloped. In fact, her lower body is quite plump. Although every part of her body is of a relatively smaller size, everything's quite well grown and curvy. As she always leaves the impression of being so mentally young, that contrast to her body really gives me quite some lure.