m1919a4 (carmilla) (girls' frontline)

M1919A4's first skin from Girls' Frontline, as part of the 'Halloween Carnival' skin collection from 2016.

It's a sexy vampire costume, whose appearances can massively shift depending on whether the censorship is turned on. With it off, she wears a scantily-clad leotard with cutouts, a cape, and wrist cuffs, as well as a skull hair ornament. With the censor on, she receives a bodysuit underneath the leotard.