Anceril Sacred is a character created by Mishima Kurone for the Pixiv Fantasia event.
I've known this character for ages, but haven't been keeping up with her up until recently, so I was surprised when I found out the artist also illustrates konosuba, as well as being the artist for La+ Darkness.
Description
Keywords:
Main Outfit - anceriseshirokami, ancermainoutfit, white hair, long hair, ahoge, hair flaps, sidelocks, hair ornament, green eyes, black choker, red jacket, black shirt, medium breasts, belt, yellow skirt, thighhighs, black gloves, brown boots, full body, holding giant sword
While you can prompt for a giant sword just fine, the sword itself doesn't look like the one she uses.