I am unsure if Mamizou is wearing thighhighs or if it is just a coloring error.
Clearly she's wearing socks that at least go past her knees. The angle completely obscures where they precisely end, but her thighs are both distinctly pale skin-colored as opposed to white so she's not wearing pantyhose.
Immediate Edit: Wait, was it the shadow that was confusing? Because her thigh is still not white before then if you look closely.
