arona (blue archive), blue archive, commentary, highres, 1girl, bare legs, blue eyes, blue hair, blue halo, blue shirt, blush, bow hairband, closed eyes, colored inner hair, envelope, eyes visible through hair, hair over one eye, hairband, halo, holding, holding envelope, ken (houndscombat), looking at viewer, multicolored hair, open mouth, pink hair, pleated skirt, sailor collar, shirt, shoes, short hair, skirt, soles, two-tone hair, white hairband, white sailor collar, white shoes, white skirt