Acnologia's preferred appearance is that of his human form, which is that of a rather muscular young man with long, dark blue colored hair. He carries a sharp gaze; his eyes have black circles around them. He is dark-skinned, and on his body he bears the same light blue markings he does when he is a Dragon. For attire, Acnologia dons a high collared, black cloak (which also bears his draconian markings), a sash around his waist, a gold arm ring tightened around his right upper arm, and baggy pants that are decorated the same as the most former article of clothing.