blue archive,kayoko \(blue archive\),kayoko \(new year\) \(blue archive\),1girl,back,black background,black choker,black flower,black hair,black horns,black kimono,choker,collarbone,demon horns,earclip,flower,from behind,grey halo,hair flower,hair ornament,halo,horns,japanese clothes,kimono,kimono partially removed,long hair,mole,mole on collarbone,multicolored hair,nape,official alternate costume,profile,red eyes,single bare shoulder,solo,two-tone hair,white hair,