Kotoharu is a teenage boy of average height, coming in a bit shorter than Akuta and around the same height as Youkou. He has dark hair of uncertain colour which is styled slightly messily. He has dark eyes and no eyebrows. He also has two short horns beside his head each which are slightly curved to the front. His mechanical swords are actually kept in his back as it appears that his entire spinal chord and shoulder blades have been removed due to a past injury. It is likely that this was the injury that made him join Jackalope as it was implied when he told Youkou about what makes a person join Jackalope.
Power & AbilitiesEdit
He is very capable swordsman, that uses a spine gears, called Hartwig Kotone (ハルトヴィヒ＝小刀根, Harutovihi Kotone) which he draws from his spine and turn into a very sharp blades
- He is obsessed with Akuta, secretly taking pictures of him or collecting things Akuta used.