1girl animal_ears backpack bag biko_pegasus_(umamusume) blue_eyes bow bowtie brown_footwear brown_hair chiaochuru cowlick full_body highres horse_ears horse_girl horse_tail looking_at_viewer open_mouth purple_shirt purple_skirt purple_thighhighs sailor_collar school_uniform shirt short_hair skirt smile solo star_(symbol) tail thighhighs tracen_school_uniform umamusume white_bow white_bowtie