1girl aged_up alternate_costume alternate_hair_length alternate_hairstyle bespectacled black_choker black_jacket black_leotard black_thighhighs black_vest book breasts choker cleavage closed_mouth colored_skin curvy glasses hair_over_one_eye holding holding_book jacket leotard long_hair looking_at_viewer multiple_views necktie red_eyes red_necktie sage_(sonic) shirt short_hair simple_background sonic_(series) sonic_frontiers thick_thighs thighhighs thighs usa37107692 vest white_background white_shirt white_skin