Complex sentence: In addition to the new costumes, Lightning's in-game model was rebuilt from the ground-up, her bust was enlarged and several of her outfits were made to show her off in a more feminine way.
Split into simpler sentences: In addition to the new costumes, Lightning's in-game model was rebuilt from the ground-up. Her breasts were enlarged and several of her outfits were designed to present her in a more feminine way.