Yeah, I found her pretty quickly after asking the question then firing the game up. I knew who she was, just didn't recognize the name. There's honestly not really a whole lot to her design, though I did discover for the first time that she was indeed an elf, though you pointed it out in your post. I was under the assumption that pretty much all the NPCs from Libra of Soul were humans, except for the obviously malfested, skeleton, or lizardfolk. The more you know!
Either way, here you are:
All they really did here was match the colors to all the armor to the gold on Sophitia's weapon, Aeneas, but the saturation is just a touch higher to give it more gold shine, I suppose. I feel like there was a half-hearted attempt to turn the sleeves for Seong Mi-na's underwear skin-toned, and I could have done a better job at it if I wanted to, but the version that actually is used by Ester herself is more white than it should be, so I left it as-is. Due to the lighting on the stage, I actually thought they did somehow manage to delete the sleeves, but after doing an armor break, the sleeves are definitely there, and more obviously discolored when the armor is broken.
Kind of expected her to be paler and with some sort of makeup.