2girls, black_headwear, breasts, child, cleavage, dual_persona, elf_kiana, english_text, formal, honkai_(series), honkai_impact_3rd, kiana_kaslana, kiana_kaslana_(white_comet), kneeling, looking_at_another, multiple_girls, multiple_persona, official_wallpaper, patting, snow, star_(symbol), suit, time_paradox, tree, white_hair, white_suit, winter_clothes