Link heard the 59% chance calculation that Fi's body could lose the additions it just gained if he pressed the yellow jewel again. He then glanced back to where his eyes had fixated a moment ago; that wobbly, bouncy goodness of Fi's pumpkin-sized cleavage overflowing her purple dress' neckline which she'd suddenly gained. The suggestion that his companion might revert to her previous state and lose her magnificent bust frightened him. Link knew he must at least hold Fi's new boobs before he'd risk losing them. Perhaps forever.
Link asked Fi to fly down to him so he could feel the changes the spirit of his sword had undergone. Fi repeated herself by saying: "Understood, master Link. I will never argue against whatever decision you plan to make." The light blue servant of the goddess them floated down to where Link stood and gently thrust out her very large bust out just infront of his hands. They subtly bounced to the rhythm of her levitating in the air, inviting Link to feel what they were like.
Fi's tits defied Link's expectations as he lifted them up from underneath, one in each open hand. They certainly felt quite hefty, as their sheer size would suggest. Link began lifting Fi's bust, and through the thin fabric of her dress his palms felt the body heat of Fi's metal-esque skin. He continued pressing his hands up into the two chest pillows and as he both sensed and saw them squish quite satisfyingly - always returning to their perky shapes when he eased up. Link also felt Fi's chest to be a perfect balance between soft and firm. Link slowly let go, observing the Fi's cleavage window as he did. The goddess sure knew how to construct her guides, he thought as Fi's blue cleavage rippled and jiggled beautifully before settling down.
Next, Link pressed both his palms over where Fi's nipples where. To his surprise, he felt small tips poking back at him, confirming to Link (and Fi!) that her boobs weren't pointless. Fi let out a surprised, pleasured moan as Link pushed in and began to squeezed his hands into her head-sized jugs. "A report, m-master," Fi informed Link mid-breast massage. "It appears that your inspection of my above average-sized breasts is causing your body's stress levels to sink rapidly. It would now seem that these blessed breasts of mine have been proven beneficiary to your health and by extention, your quest." Link could do nothing but smile in agreement to Fi's analysis, as he simply resumed kneading her breast flesh in accordance with her discovery.
While Link released more and more of his pent up stress through playing with Fi's chest, Fi again told Link her thoughts on the matter. "Master Link. Since the sword you activated this mode through is from the Goddess Hylia's own design, I therefore conclude with 96% certaintly that the expansion of my body was intentional by her. An optional function that blessed her chosen hero during his quest to save the land." The explanation seemed logical to Link. Though, his mind wondered if *this* was it. Hylia's limit couldn't just be pumpkin-sized boobs, Link wondered. Then he got an idea.
Releasing his grip of her, Link took a few step backs and looked at Fi from the side. Immediately something felt, sort of, incomplete... Fi's absolute lack of... gluteus maximus. He closed one eye and gestured with his thumbs and fingers to simulate a picture-frame. Now, hw had decided. Fi needed to be much more hourglass-y...somehow.
"Master? Is something the matter?" His sword's spirit and quest companion asked, eager to do whatever she needed to help solve Link conundrum. Link then asked Fi to remember how she had felt when her breasts first grew. 'Could she concentrate on that feeling again? And then preferably direct that feeling to her ass?' To Link's delight, Fi nodded at his request and flew upwards a bit and readied herself to attempt an adjustment of her feminine figure. "Right away, master." She stated plainly, then she began to focus her will and body. Using whever magical and devine powers Hylia had bestowed her, Fi felt it working exactly how her master Link had intended it to - and just moments before she felt the reaction begin on her lower body she realised the potential of her until now hidden ability: it was endless.
Surging out quickly from her plain backside, the cheeks that were there but covered by her dress filled themselves out. Fi's hips widened out, while both her thighs became more thicc against her green fish-net stockings. Fi's beautifully pale, light blue rump revealed itself to the world, forming itself quickly into a pair of huge plump, orb-shaped ass cheeks which sexily jutted out atop her alluring legs and being pressed down by the bottom of her stubbornly sturdy, but flexible purple dress.
Her two pair of assets complemented each other perfectly. She had a slim waist, huge pumpkin-sized tits with cleavage overflow, meaty and wide thighs that clung against her stylish fish-net stockings and to top it off: dat ass. Her curvy hips and huge butt-spheres' upper half were stretching her dress out, while her exposed lower half gleamed in the sunlight.
Link was blinded by the glory of this sight (and the sun gleaming in his eyes). His jaw dropped and he felt himself holding back tears. Instinctually he pounced on Fi's new butt and let his face sink into the metaphorical flesh canyon while he hugged her thighs. His mind was filled with gratitude, and somehow he sensed that Fi too was also relishing in this moment. Her master, squishing his hero-face in her massive tush, whom he found just as soft as imagined, if not even softer...Like, burying his face in dough. She was now a perfectly proportional hourglass with large boobs and a huge butt.
This ass would be the perfect sleeping pillow for himself, Link decided, and vetoed against further exploration today. Instead, a better use of his and Fi's time would be to find some shade under a nearby suitable tree, and let him rest there the whole night, with the marvelously curvy hourglass figure of Fi as his pillow.
What happened to Link and Fi the next morning?