Model A should be called: Shodo!

1girl, aqua dress, bare shoulders, black footwear, black hair, branch, brown hair, brush, bug, butterfly, calligraphy, calligraphy brush, cherry blossoms, detached sleeves, dress, floating hair, flower, full body, from side, 3/4 view, cowboy shot, glasses, hair ribbon, holding, holding brush, holding paintbrush, kneeling, long hair, long sleeves, looking at viewer, oversized object, paintbrush, pantyhose, parted lips, petals, pink flower, ribbon, round eyewear, scroll, seiza, shoulder cutout, sitting, sleeveless, solo, spring (season), thighhighs, tree, twintails, two side up, white dress, white ribbon, white thighhighs, mgong520, rei (sanbonzakura)