siera (sieracitrus) girl long hair blush animal ears tail animal ear fluff hair between eyes long sleeves hair ornament shirt white hair cat ears bow skirt cat tail yellow eyes jacket thighhighs neko parted lips outdoors hair bow choker pleated skirt day black skirt school uniform sailor collar black choker puffy sleeves feet out of frame bell black shirt black bow thigh strap serafuku puffy long sleeves neckerchief black thighhighs jingle bell indie virtual youtuber x hair ornament miniskirt dutch angle neck bell white sailor collar black serafuku pink jacket cropped shirt breath yellow neckerchief sailor shirt low-tied sidelocks