It's a shame that this is just an edited face cosplay photo. But I instantly found it very charming because it lacks the usual over the top expression and pose from many cosplay photo.
She looks curious and playful but without faking innocence or giving the "naughty girl" impression. Even just in underwear she doesn't try emphasising her sensuality.
Well, it's sign of the better cosplay artists in my opinion. To do it well, work hard on make up, body care, and to be their character naturally.
Cool pose and naughty sexy pose is a one hit out for me.