Like all Padjal he has two thin horns growing from his head. He has a slightly darker skin tone than the other known Padjal, and darker, shorter hair. His eyes are pink. Not of the prestigious Senna family, and not Stillglade Fane's Guildmaster, O-App appears as casual as any normal child, wearing a short-sleeved shirt and shorts. However, like all Padjal he is much older and wiser than he looks, and respected throughout Gridania as a valued bridge between mankind and Elemental.