Added tags specially to get her different costumes and variations.

ErisDress -> white jacket, long sleeves, long sleeves, black neck ribbon, bare shoulders, black skirt, frilled skirt, long skirt, white pantyhose, mary janes

ErisTraining -> white shirt, long sleeves, brown bowtie, armor, breastplate, black shorts, brown boots

(Extra elements -> white cloak , hooded cloak, animal hood)

ErisPartyDress -> white dress, long sleeves, white pantyhose, gold string belt (not accurate but get best result)

(Change hair adding high ponytail, hair ornament, flower)

ErisWNight -> nightgown, white dress, red ribbon, frills, bare shoulders

ErisBNight -> nightgown, black dress, black ribbon, frills, bare shoulders

ErisCombat1 -> white shirt, short sleeves, armor, breastplate, black pants, boots

ErisCombat2 -> white shirt, long sleeves, black elbow gloves, black chest guard, single chest guard, black pants, brown footwear

ErisIndian -> crop top, collarbone, bare shoulders, brown skirt, navel, bike shorts under skirt

(Change hair adding twintails)

Also to make distinction I tagged differently the hairband. While wearing her usual dress and with her training outfit, she uses the characteristic black hairband but with other ones, specially with the outfits used on her journey through the demon continent, is best to use black headband which adds the distinguishible pattern and more accurate.