My entry for the FF XIII LR contest! At first, coming up with the concept was challenging, until I came up with a method.
If you're looking through entries to find inspiration right now, this is what I recommend: Take elements from Lightning's previous outfits (specifically the main ones from previous games) and write them down. I found a popped collar, a shoulder or arm plate/pad, square shapes, and defined lines. Design some pieces around these themes, and an item. I chose ice, for example. Continue the theme through the rest of the outfit, preferably following a well thought out colour scheme. Personally, I designed her shield and copied them onto her shoulders, but your design process is completely up to you.
Thank you for considering my entry!