

As noted by Tetchō, he has an infamous habit of tormenting others until they are forced to spill his needed details during investigations, which he seems to find amusement in. Quite contrary to Tetchō's nature during interrogations, Jōno has a sadistic side to him in extracting information from his targets. Sensitive to his surroundings, Jōno also detests intense emotions and abrupt changes in moods from those around him. He also tends to either silently or vocally wish ill will towards other people with a rather antagonistic attitude towards him, including Tetchō and even a government official. He even subtly scolds his commander Ōchi Fukuchi for the latter's theatrics towards military troops and afterwards threatens to shoot him from behind, showing that his violent tendencies are no different from his comrades. Tetchō Suehiro finds himself on the receiving end of much of these remarks due to his offbeat nature, easily exasperating Jōno.

Jōno hides a fierce temper behind composed expressions, mixing them with harsh threats and remarks towards his comrades. As such, he nonchalantly arrests Osamu Dazai upon their first meeting, expressing his thoughts against Dazai's blood-covered past with great disapproval. However, he does not take interruptions nor injustice lightly. Upon first appearance, Jōno has the calmest, most composed personality of the Hunting Dogs unit. Jōno's nonchalant expression while arresting Dazai. Along with his Hunting Dogs uniform, he wears a long earring on his right ear. As he is blind, he almost always keeps his eyes closed. Jōno is a young man with mostly light-colored hair with tips that fade into red.
