This character is charlotte_christine_de_colde from samurai spirits and she officialy proved ancestors of blue mary
I think prompt is
Charlottess, solo ,armor, blonde hair ,1girl, weapon, blue eyes ,gauntlets ,boots ,shoulder armor ,polearm, dress, pauldrons ,breastplate, long hair
greaves, lance ,armored dress , holding one hand weapon , gloves ,armored boots, short hair ,looking at viewer, rapier, elbow gloves ,belt ,black gloves ,full armor ,thighhighs