yatsuha (hachiyoh), arona (blue archive), blue archive, highres, official art, 1girl, blue hair, blue halo, blue serafuku, blue shirt, bow hairband, braid, chair, choker, colored inner hair, desk, earbuds, earphones, hair over one eye, hairband, halo, headphones, holding, holding earphones, holding headphones, looking at viewer, multicolored hair, neckerchief, on chair, open mouth, pink hair, ribbon, sailor collar, school chair, school desk, school uniform, serafuku, shirt, short hair, single braid, sitting, upper body, white choker, white neckerchief, white ribbon, white sailor collar