1girl, ahoge, armor, black_footwear, boots, breasts, cleavage, closed_mouth, full_body, grey_background, hetare_mizu, holding, holding_sword, holding_weapon, honkai_(series), honkai_impact_3rd, horns, japanese_armor, katana, long_hair, looking_at_viewer, purple_eyes, purple_hair, raiden_mei, raiden_mei_(herrscher_of_thunder), sheath, sheathed, simple_background, smile, solo, standing, sword, thighhighs, weapon, white_thighhighs