mk23 (impish sweetheart) (girls' frontline)
Mk23's first skin from Girls' Frontline, as part of the 'Halloween Carnival' skin collection from 2016.
It's a Halloween costume, consisting of a red-and-black dress, puffy armlets in the same color scheme, a thighlet, anklets, and black footwear with bells on them. She has a cross-shaped tiara, heart earrings, bat wings and a jack-o'-lantern accessory on her tail.
This tag implicates mk23_(girls'_frontline) (learn more).