Kouga was a young man with spiky black hair. He wore a light-colored trench coat with dark pants and boots.
Kouga was very serious and seemed to be rather mature. He was annoyed when other troupe members acted childishly but he also appeared to be protective over them. He was brave and didn't hesitate to face enemies, even if they outnumbered him. While he admired Akame and Tsukushi for their skills, he still viewed them as young children and was hesitant to let them join their cause. He also strongly believed in changing the corrupted Empire and despised it for using children as assassins.
Kouga worked as a traveling performer along with his troupe while also gathering evidence against The Empire for the Revolutionary Army. One day, the troupe picked up Akame and Tsukushi, who started working as a part of their show and proved to be successful. A month later, the troupe was attacked by the Bandits of the Shiranami Mountains during their travels, and after Akame and Tsukushi skillfully dealt with the enemies, Sabatini revealed his group's true purpose to the girls. However, as he offered them to join their cause, a fight broke out as the two revealed themselves to be the Empire's assassins and started killing the whole troupe. Kouga was eventually slain by Akame while lamenting his inability to fulfill his wish of changing the Empire.
Kouga was shown to wield a sword.