phantom (hollow knight), hollow knight, hollow knight: silksong, commission, highres, arthropod girl, black hair, black skin, bug, butterfly, colored skin, corvus noctis, dress, floating, floating hair, from behind, ghost, grey dress, in-universe location, insect, instrument, mask, music, organ (instrument), piano bench, pipe organ, playing instrument, playing piano, standing, unworn mask, wavy hair, weapon, white mask, wraith (hollow knight)